Roof Walling Installation Entire Manual
Transcript of Roof Walling Installation Entire Manual
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 1/70
Rainwater SolutionsRainwater Solutions
Fencing SolutionsFencing Solutions
Roofing & Walling SolutionsRoofing & Walling Solutions
Customer SupportCustomer Support
House Framing SolutionsHouse Framing Solutions
Structural SolutionsStructural Solutions
Home ImprovementsHome Improvements
Using Lysaght®
Roofing & Walling
Using Lysaght®
Roofing & Walling
2006 Edition
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 2/70
Using LYSAGHT®
Roofing & Walling
© Copyright BlueScope Steel Limited 2 February 2006
LYSAGHT®, COLORBOND®, CUSTOM ORB®, CUSTOM BLUE ORB®,INTEGRITY ® 820, EASYCLAD®, KLIP-LOK ®, LONGLINE® 305,MINI ORB®, MULTILINE®, PANELRIB®, SPANDEK ®, TRIMDEK ®,
TRIMWALL®, WALLCALD®, and ZINCALUME® are trademarks of BlueScope Steel Limited A.B.N. 16 000 011 058
The LYSAGHT® range of products is exclusively made byBlueScope Steel Limited trading as BlueScope Lysaght.
Information, brochures and
your local distributor
1800 641 417
Please check the latest informationwhich is always available at
www.lysaght.comFor further information about Lysaghtproducts included here, refer to theproduct’s technical brochure which isavailable at 1800 641 417 or you candownload it at www.lysaght.com.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 3/70
Using
LYSAGHT®
roofing
and walling
2006
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 4/70
Pub lished by B lueScop e Lysag ht Limited
© BlueSco pe Lysag ht Limited 2006
Using Lysaght Roofing and Walling
Previously published as
Steel Roofing and Walling: Installation Manual.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 5/70
PART B: INSTALLATION 27
General care, safety and handling 277.1 Sa fety 27
7.2 Ca re and sto ra ge b efo re insta lla tion 27
7.3 Hand ling clad d ing on site 27
7.4 Wa lking on roo fs 27
7.5 Marking out, cutting and d rilling 27
7.6 Clean up 28
7.7 Wa rn o ther contracto rs 287.8 Strippab le coa ting s 28
7.9 Sea la nts 28
7.10 Maintenance 29
Installing pierce-fixed cladding 318.1 G enera l insta lla tion proced ure 31
8.2 Side -lap ping &p ositioning pierce-fixed sheet s33
8.3 Pierce-fixing on crests 33
8.4 P ie rce-f ixing on va lleys (fo r wa lling on ly) 34
8.5 Pierce-fixing on sid e-laps 34
8.6 Insta lling MINI ORB 34
Installing concealed-fixed cladding 359.1 Insta lling KLIP-LOK roo fs 35
9.2 Insta lling KLIP-LOK w alls 39
9.3 Insta lling EASYCLAD HI-TEN 40
9.4 Insta lling LONG LINE 305 roo fs 42
Ends of sheets 4410.1 Turn-ups 44
10.2 Turning -d own 46
10.3 Blocking o ff rib ca vit ies 47
10.4 End -lapping 48
10.5 Expa nsion 50
10.6 Roo f overhang with ed g e stiffener 51
Flashings 5211.1 Materia ls 52
11.2 Long itud ina l fla shing s 52
11.3 Transverse flashing s 53
11.4 Flashing a t chang e o f pitch 55
11.5 Flashing la rg e roo f penetra t ions 56
11.6 Flashing sma ll roo f penetra tions 58
11.7 Flashing w a lls 59
11.8 Bushfire pro tection 61
References 62
Index 63
Introduction 1
PART A: DESIGN 2
Design preliminaries 22.1 Prod uct selection 2
2.2 Ma teria ls and finishes 2
2.3 Support spacing s 3
2.4 Maximum leng ths of roofing 3
2.5 Low roo f pitches 3
2.6 Wind fo rces on roo fs 3
2.8 Cod es and perfo rmance tests 32.9 Environmenta l cond it ions 4
2.10 Meta l a nd t imb er compa tib ility 4
2.11 Transporta tion 4
Fasteners 93.1 Ma teria ls for screws 9
3.3 Ma teria ls for b lind rivets 9
3.4 Ma teria ls for sea ling w ashers 9
3.5 Id entifica t ion of screw s 10
3.6 Sett ing o f screws 10
3.7 Q uant ity o f fa steners a nd clips 11
3.8 Re co mme nd ed fa st ene rs a nd lo ca tio ns 11
Curved, bent & tapered cladding 164.1 Spring -curved -rid g e roo f 16
4.2 Spring -a rched roof 17
4.3 Spring -curved conca ve roo fs 18
4.4 Pre-curved roo fs 18
4.5 Capped b ent rib b ed roo fs 19
4.6 Ta pered roofing 19
Insulation & skylights 205.1 Hea t contro l 20
5.2 Cond ensa t ion 21
5.3 Noise red uct ion 225.4 Insula tion ma teria ls 22
5.5 Insula tion thickness 23
5.6 Skylig ht ing 23
Roof drainage 246.1 Introd uction 24
6.2 Design o f dra inage (eaves-gu t te r system) 24
6.3 G utter fa ll 25
Contents
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 6/70
Contemporary and traditional –both areaccomplished with ease using LYSAGHT
building products.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 7/70
1 I n t r o d u c t i o n
INTRODUCTION 1
1
Introduction
WarrantiesFor well over 100 yea rs we have co nsistent ly
manufactured the highest quality building products.
TheLYSAGHT
®
brand is synonymous with Australianbuilding.
Our cont inuing confidence in our prod ucts is show n in
the warranties we offer.
Our prod ucts are e ngineered to perform according to
our specificat ions only if they are installed to t he
recommendations in this manual and our other
publications.
Nat urally, t he wa rrant ies req uire specifiers a nd
installers to exercise due ca re in how t he products a re
applied and installed. And, owners need to maintainthe finished wo rk.
We invite yo u to a sk ab out the warranties ap plicable to
your proposed purchase, at your supplier of LYSAGHT
products.
Further information• Your supplier o f LYSAGHT products
• BlueScope Lysag ht Information Service
on 1800 641 417
• w ww.lysa g ht .co m
ScopeThis bo ok is a g uide to the installat ion o f stee l roo fing
and walling manufactured by BlueScope Lysaght. We
intend t hat it be used by a ll trad es and professionsinvolved with specifying and applying the wide range
of our products.
We refer o nly to g enuine ste el roofing and wa lling
manufactured by us and marketed under our brand
names. Our recommendations should only be used for
our prod ucts because they are based on
comprehensive testing of our profiles, base-metal-
thicknesses (BMT) a nd ma te ria l finishe s.
Specific product informationWe also have specific publicat ions for a ll of our
products, a nd yo u should use them in conjunction with
this manual.
Cyclonic conditionsIn g eneral, this bo ok refers to non-cyclonic cond itions.
Design information for cyclonic areas is in our Cyclonic
Area Design Manual.
Your suggestions
Please send your suggestions for improvements to thismanua l to BlueScope Lysag ht, Technolog y Ce ntre,
PO Box 504, Chester Hill, 2162.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 8/70
2.2 Materials and finishesOur most widely used cladd ing profiles are listed in
Tab les 2.3.1 and 2.3.2. They a re a vailab le in
COLORBOND® prep ainte d ste el comp lying w ith AS/NZS
2728:1997, or in unpainted ZINCALUME® aluminium/zinc
alloy-coa te d stee l complying with AS 1397—2001.
COLORBOND® steel has either a ZINCALUME
® or st ainless
steel base meta l, with a rang e of orga nic coatings to
cope w ith exposure to a rang e of environments.
• COLORBOND® is prepa inted stee l for exterior roofing
and walling. It is the most widely used.
• COLORBOND®
METALLIC is prepa inted stee l for superior
aesthetic qualities displaying a metallic sheen.
• COLORBOND®
ULTRA is prepa inted stee l for severe
coastal or industrial environments (generally within
ab out 100 to 200 metres of the source).
• COLORBOND®
STAINLES S is prepa inted sta inless ste el forvery severe coa sta l or industrial environme nts
(g enera lly within ab out 100 met res of the so urce).
Check with your local BlueScop e Lysag ht o ffice fo r
ava ilab ility o f profiles, co lours, acce ssories; a nd for
suita bility of the product.
Tab les 2.3.1 and 2.3.2 list ge nera l informat ion for
profile selection. Refer to our pub licat ions o n spe cific
products for de ta iled spe cificat ions. There a re also
publicat ions o n ZINCALUME® steel and COLORBOND
®
prepa inted stee l from our informat ion line (Pa g e 1).
Material specifications• ZINCALUME
® aluminium/zinc alloy-coa te d st ee l
co mplying w ith AS 1397—2001. Minimum yield
streng ths are G 550 (550 MPa), or G300 (300 MPa)
depending on profile. Minimum coating mass is
AZ150 (150 g /m2 ), o r AZ200 (200 g /m2 )
depending on the product.
• Stainless steel complying w ith AS 1449—1994
(430 SS 550 or 430 SS 300).
2
Design preliminaries
2.1 Product selectionWhen you d esign ste el clad ding into your building yo u
have a wide rang e o f profiles from which to choose.
Whilst roo fing and wa lling ob viously have to kee p o ut
the we ather, they also have sig nificant e ffects on t he
loo ks, cost a nd d urab ility of a b uilding.
Other factors that affect selection a re t reat ed in
Chapte rs 2 to 6.
WallsThe d esign o f wa lling is fairly straightfo rward. O nce yo u
have made the aesthetic decision of which profile to
use, the ma in considerations are the support spacings
(Section 2.3), fixing details (Chapter 3) and the details
of flashing (Chapter 11).
RoofsThere are ma ny facto rs in de sig ning roofs including:
• the shape: is the roof to be ‘ fla t ’ or pitched
or curved ?
• the support ing s tructure and support spacing;
• the wind forces that the roof must sustain;
• the pitch which affects the looks, the profile’s
ab ility to efficiently carry rain to the g utte rs, and
fixing details;
• thermal expansion of long sheets (Chapter 10).
This bo ok doe sn’t att empt to co ver the structural
design d eta ils of supports or ae sthetics: there a re ma ny
other te xts and Australian Sta ndards that cover them.
This chapte r gives ta bles of recommend ed support
spacings, and the maximum roof length for pitch and
rainfall intensity.
2 DESIGN—DESIGN PRELIMINARIES
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 9/70
2 D e
s i g n p r e l i m i n a r i e s
DESIGN—DESIGN PRELIMINARIES 3
2.5 Low roof pitchesUnless the re is ad eq uate po sitive fa ll in a roof, the re is
da nge r of ponding, which can lea d to a reduced
service life, particularly in coastal areas.
At low slopes, say around 1 in 50 (1°) slope, all roof
supports must be in the one plane because slight
variations ca n result in zero or neg a tive fall. This ma y
occur even after completion of the building as the
result o f sett leme nt, timbe r wa rping or shrinking , or
extra loadings (like air conditioners).
Wherever possible, you should d esign fo r a minimum
slope of 1 in 30 (2° ). Minimum slope s a re liste d in
Tab le 2.3.1 at t he end of this chapte r).
2.6 Wind forces on roofsWinds create considerable forces on both the
topside a nd the underside of roof clad ding , and you
must consider these forces in the design and fixing of
any roo f. The fo rces a re:
• inward forces tending t o collapse the roof cladd ing
inwards, caused by wind acting directly on the
windward side; and
• outward forces tending to lift the roof cladding
from its framing, a nd t he e ntire roo f structure from
the rest of the building. Outwa rd forces can be
caused both by uplift from negative wind pressures,
outside t he b uilding ; and by p ositive wind pressure
inside the building.
G enerally the g reat est w ind forces imposed on roofs
are due to the outward forces. Because the dead
we ig ht o f roofing mat erials is relat ively small, the
outwa rd forces must be resisted by the roof fasteners.
It is very important that the battens and roof framingare ad eq uately fixed to the rafters and wa lls, and that
under extreme conditions the wall framing is anchored
to the footings. Special anchoring provisions may apply
in cyclonic areas.
2.8 Codes and performance testsAS 1562.1—1992 specifies the design and installation
of sheet metal roof and wall cladding. Our roofing
profiles sa tisfy all the req uirements o f this standa rd,
including the ability of the roof to resist outward forces
and co ncentrat ed loa ds. The testing is performedaccording to AS 4040.
2.3 Support spacingsThe ma ximum reco mmend ed support spa cing s are
show n in Ta bles 2.3.1 and 2.3.2. They a re ba sed on
test ing in acco rdance w ith AS 1562.1—1992 Design
and installation of sheet roof and wall cladding: Metal,
and AS 4040.1—1992 Methods of testing sheet roof
and wall cladding—Resistance to concentrated loads.
The spa cing s in the t ab les for roo fs are recommend ed
to produce adequate performance of roof claddings
under foo t t raffic load ing (incide nta l for ma intena nce).
For walls, the follow ing cond itions ap ply:
• building s up to 10 m hig h in Reg ion B Terrain
Category 3 conditions (Vs = 38 m/s andVu = 60 m/s);
• Cp , e = -0.65 (for wa lls), Cp, i = 0.2 a nd Kl up to
2.0, in acco rda nce with AS 1170.2—1989 SAA
Loading Code: Wind loads.
In all cases, cladd ing is fixed t o a support o f 1.0 mm
minimum b a se met a l thickness (BMT) and minimum
yield stress of G550. If you want to use metal
ba ttens thinner than 1.0 mm, seek advice from our
information line.
For support spacings in wind conditions other thanthose shown, refer to our publicat ions o n specific
products for wind pressure data.
2.4 Maximum lengths of roofingThe valleys (or pa ns) of roo fing ha ve to ca rry wa te r
to the gutters. If in heavy rain, the valleys overfill,
water can flow into the roof through the side-laps
and flashings.
Facto rs affecting d rainag e cap acity and wa terproo f-
ness of t he laps o f a p rofile include:
• the width and depth of the valleys or pans;
• the pitch of the roof—rain flows fas ter on a
steepe r pitch;
• rainfall intensity for the geog raphical area;
• the length of the roof from ridge to g utter; and
• penetrat ions that cause nearby valleys to carry
extra rain diverted from valleys obstructed by
the pene tration (Fig ure 2.4.1).
The ma ximum roof leng ths for d rainag e fo r ea ch profile
are g iven in Tab le 2.4.1 at t he end of this chapte r.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 10/70
• ve ge ta ble ma tte r
• any material which will inhibit normal exposure
to the atmosphere
Paint and COLORBOND® finishesCOLORBOND
® finishes can be damaged by some types of
pa int. There can a lso b e p roblems of co lour mat ching
due to different weathering characteristics.
Cladding with severely da mag ed COLORBOND® paint are
best replaced rather than p atched up. We recommend
that you don’t touch up minor scratches with paint.
You ma y overpaint who le roo fs and p aint acce ssories
to mat ch spe cific co lours. The pa rticular p aints a nd
methods required are discussed in Technical Bulletin
TB-2, published by BlueScope Lysaght.
2.11 TransportationBecause our roofing and walling is manufactured by
continuous processes, sheet lengths can be supplied
up to the limits o f transpo rt regulations, which vary
from state to state .
Metal roofing products must comply with the
performance spe cifications, and be checked by
stringe nt te sts, in accordance with the standa rd. Such
tests have b een ca rried out o n all our clad ding s and the
results have been used in the preparation of the fixing
and installat ion reco mmend at ions in this manual.
2.9 Environmental conditionsCoate d steel products can be d amag ed b y some
environmental conditions including industrial,
agricultural, marine, intensive animal farming,
swimming pools or other aggressive conditions.
If any of our products are to be used in these
conditions, or unusually corrosive environments,
seek advice from our information line (Page 1).
2.10 Metal and timber compatibility Conta ct with, or runoff from, some ma terials can
da mag e coa ted steel prod ucts. Building s can also
be susceptible to condensation on inside sufaces.
The ma terials include certa in met als, treat ed timbers
and chemicals.
• Don’t a llow any contact of coated steel products
with incompa tible mat erials.
• Don’t a llow discharge of ra inwater f rom
incompatible ma terials onto co ate d steel products
(Ta b le 2.10.1).
• Ensure that support ing members are compatib le
with the coa ted steel prod ucts or, alternatively,
appropriate ly coated .
If there are d oubts a bo ut the compat ibility of
other products being used, seek advice from our
information line.
Incompatible materials include:• lea d
• copper
• monel meta l
• bare steel
• s ta inless s teel (except with COLORBOND®
stainless cladding)
• carbon (in pencils and some rubbers)
• green or some chemically-treated t imber
(like CCA or tanalith treatments)
• materials subject to cycles of dryness and
we tness o r which have excessive mo isture
conte nt (such as improp erly-sea soned timber)
• w et and d ry co ncre te
• soils
4 DESIGN—DESIGN PRELIMINARIES
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 11/70
2 D e
s i g n p r e l i m i n a r i e s
DESIGN—DESIGN PRELIMINARIES 5
Table 2.1 0.1 Acceptability of drainage from one surface onto another
CUSTOM BLUE ORB lends itself to the smooth curves of large
arched roofs. This roof has bothconvex and concave curves.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 12/70
Table 2.3.1Specifications of roofing & walling profiles
6 DESIGN—DESIGN PRELIMINARIES
12
24.0
84.0
7.4
3.5
017
017
007
007
34
34
)03ni1(°2
)05ni1(°1
0561
0502
0571
0532
0022
0082
051
002
054
005
0042
0072
0003
0033
0063
0093
051
002
07.0 7.9 013 503 84 )05ni1(°1 0081 0002 0052 051 054 - 0072 0072 054
24.0
84.0
7.4
3.5
457
457
007
007
42
42
)02ni1(°3
)02ni1(°3
0031
0002
0081
0022
0042
0003
003
004
006
007
0052
0003
0003
0003
0033
0033
003
004
24.0
84.0
3.4
9.4
618
618
267
267
92
92
)03ni1(°2
)03ni1(°2
0011
0061
0031
0581
0091
0062
051
002
003
053
0042
0072
0003
0003
0003
0003
051
002
1 detniapnuroferasessaM EMULACNIZ .leets2 .°1tahctipfoorhtiw noituacesU3 .'deneffits'fonoitanalpxerof6.01noitceSeeS4 troppusrep,teehsrepsrenetsaf5htiW5 .spilcfogninoitcnufreporprofsteehsfosdnemorfmm57ebtsumspilC6 troppusrep,teehsrepsrenetsaf4htiW
stroppusf ognicapsdednemmocermumi xaMSFOOR SLLAW
gnahrevO 3
TMB ssaM 1
htdiWllarevo.xorppa
revoChtdiw
biRhtped
hctipfooRmuminim 2 elgniS dnE lanretnI
-ffitsnUdene
-ffitSdene
elgniS dnE lanretnI -revO
gnah
mm m/gk 2 mm mm mm seerged mm mm mm mm mm mm mm mm mm
24.0
84.0
3.4
9.4
838
838
267
267
61
61
)21ni1(°5
)21ni1(°5
007
008
009
0031
0021
0071
002
052
003
053
0081
0081
0052
0072
0072
0072
002
052
06.0
08.0
1.6
0.8
838
838
267
267
71
71
)21ni1(°5
)21ni1(°5
0061
0081
0061
0081
0081
0062
002
004
003
006
0042
0042
0003
0023
0033
0063
002
004
24.0
84.0
6.4
2.5
598
598
028
028
84
84
)03ni1(°2
)05ni1(°1
0012
0052
0032
0552
0082
0503
051
002
003
053
0062
0072
0043
0063
0063
0063
051
002
24.0
84.0
06.0
9.4
6.5
9.6
234
234
234
604
604
604
14
14
14
)03ni1(°2
)05ni1(°1
)05ni1(°1
0051
0081
0032
0071
0042
0072
0012
0003
0063
002
002
003
006
006
009
0062
0092
0003
0062
0003
0043
0062
0063
0063
003
004
006
1
2
4
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 13/70
2 D e
s i g n p r e l i m i n a r i e s
DESIGN—DESIGN PRELIMINARIES 7
Table 2.3.2 Specifications of profiles for walling only
WALLCLAD
TRIMWALL
EASY-CLAD 4P 300
EASY-CLAD 2PF 300
PANELRIB6
MINI 0RB7
MULTICLAD
MULTILINE 900
E S
I S
E S
S i n g l e
s p a n
Spacing definitions ES =Endspan
IS =InternalspanO = Overhang
I S
O
O
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 14/70
Figure 2.4 .1
Example of calculatingeffective roof lengths where penetrations alter the flow of water on a roof.
Table 2.4.1Maximum roof lengths for drainage measured from ridge to gutter (m)Penet rations alter the flow of wa ter on a roof. Thus, for design, you need to use an
effective ro of lengt h (Figure 2.4.1).
8 DESIGN—DESIGN PRELIMINARIES
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 15/70
3 F a s t e n e r s
DESIGN—FASTENERS 9
3
FastenersWhen you select faste ners, you should co nside r the d esign life o f
the structure, b ecause the fasteners and the clad ding mate rial
should have similar life expectancies.
3.1 Materials for screwsScrew s a re a vailab le in a va riety of mat erials, finishes, co lour to
match COLORBOND® prepa inted stee l, and d esign. You should use
screws to AS 3566—2002 Class 3 (or better). Additional
information on fastener finishes is in the technical bulletin TB-16.
Table 3.1.1Materials for screws
3.2 Materials for nailsNails should b e o f g alvanised st ee l. They are only used to fix the
clips of some concealed-fixed cladding to timber supports.
3.3 Materials for blind rivetsFor COLORBOND
®STAINLES S use stainless steel blind rivets with
stainless ste el mand rels; for G ALVABO ND ® , ZINCALUME® and
COLORBOND® steels, use aluminium blind rivets. Blind rivets are
used for fixing flashings, a ccessories a nd side -lap s.
3.4 Materials for sealing washersSealing wa shers used under the head s of screws o n COLORBOND
®
finishes must be made from materials that don’t have significant
levels of conductive carbon black, particularly in marine
environments. Use wa shers, not neoprene.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 16/70
3.5 Identification of screwsThe format of the number cod e is:
14 – 20 x 45Scre w g aug e Thre ad p it ch O ve ra ll le ng th of the
(Th re a d o ut sid e (t hre a d s p e r s cre w me a sure d fro md iameter) inch) und er the head (mm)
Fasteners must have a coating system to meet AS 3566 Class 3.
or
Fasteners must have a coating system to meet AS 3566 Class 4.
Ripple Teks are reg istered trad emarks of ITW Buildex.
3.6 Setting of screwsFasteners with sealing washers should be tightened only until
the w asher is g ripped firmly enoug h to provide a wea thertig ht
sea l. The faste ners should not b e o ver-tighte ned b eca use this
may split the sealing washer or deform the sheet, either of which
could lea d to wa te r pene trat ion. Take particular care when valley
fixing be cause t here is no flexibility w ith the sheet hard a g ainst
its suppo rt.
Table 3.5.1Featuresof recommended screws
Figure 3.6.1It is important that you set screws correctly
Figure 3.5 .1Typical hexagon-headed screws
10 DESIGN—FASTENERS
epyt wer cS daHe ntiopllir D
,rehsawnogaxeHref awro
MDPEenonro
&htgnelwercsnosdnepeDesu
,rehsawnogaxeH
ref awro
MDPE
enonro
&htgnelwercsnosdnepeD
esu
,rehsawnogaxeHref awro
MDPEenonro
rehsawnogaxeH MDPE
enonro syawAl
s wer csgnihctitS
nihthtiwnogaxehdettolS
.rehsaw.elbaliavaosladetarreS
MDPE
enonro eldeeN
s ®k eTelppiR daehgnilaes-f leslaicepS
Seal
Metal - Hex head, self drilling,
self tapping screw f or thin battens
Metal - Hex head, self drilling,
self tapping screw with seal
Hex head, self drilling, self tapping
screw with seal and extended drill
Timber - Hex head, self drilling,
self tapping screw with seal
Shank protection
Self drilling for metal
Self drilling for timber
Self drilling for metal
Self drilling for metal
Self drilling for metal
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 17/70
3 F a s t e n e r s
DESIGN—FASTENERS 11
3.7 Quantity of fasteners and clips
KLIP-LOK 406, KLIP-LOK 700HS and LONGLINE 305For number of clips, see equation at right.
For KLIP-LOK 406, there are 2 fasteners per clip.
For KLIP-LOK 700, there are 3 fasteners per clip.
For LONG LINE 305, there is 1 faste ner per clip.
Pierce-fixed profilesFor number of fa steners, see e q uation at rig ht (n is the numb er
of fast eners per suppo rt, as show n in the d iag rams in Tab le 3.8.1).
Side-lapsSide-lap fasteners are o ften placed at ab out 900 mm centres,
see equation at right.
3.8 Recommended fasteners and locationsReco mmend ed faste ners and the ir loca tions are in Tab le 3.8.1.
Fastener length with insulationWhere insulat ion is installed under cladd ing , you ma y need to
increa se the leng th of screws g iven in Tab le 3.8.1, depe nding o n
the de nsity a nd t hickness of the insulat ion. When the screw is
properly tightened (Section 3.6):
• INTO METAL: there should b e a t lea st three thread s protrudingpast t he support you are fixing to—but the shank prote ction
must not rea ch that support;
• INTO TIMBER: the screw must penetrate the timber by the same
amount tha t the recommende d screw w ould d o if there we re
no insulation.
Fixing to steel thicker than 3 mm• Use Hex head self drilling self tapping screws with seal with an
extended drill point; or
• in a pre-drilled ho le, use Hex head self drilling self tapping
screws with seal, of 12 gauge–14 pitch, with the length asspecified in Tab le 3.8.1.
Side-lap and accessory fasteningsFor MINI ORB and PANELRIB use 3.2 mm diameter aluminium sealed
blind rivets. For all other products use:
• S t itching screws with seal: 8–15 x 15; or
• Hex head self drilling self tap ping screws with sea l: 10-16 x 16;
or
• Sealed blind rivets: 4.8 mm diameter aluminium (not MINI ORB
and PANELRIB—see above).
Number of clips per job =
(Number o f purlins) x (Numbe r of shee ts + 1)
Number of fasteners per job (for pierced fixing) =
n x (Number of sheets) x (Number of supports)
Number of side-lap fasteners pe r sheet =
Support spacing (in mm) x Number of supports
900
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 18/70
KEY
† Fasteners per sheet per support
S = Sid e -la p
Table 3.8.1Guide to fasteners without insulation
12 DESIGN—FASTENERS
Do not fix screws
less than 25mm
from the end of sheet.
EASYCLAD4P
EASYCLAD2P
1 fastener†
1 fastener†
Do not fix screws
less than 25mm
from the end of sheet.
BROEULBMOTSUCDNABROMOTSUC
leetsotgnixiF
Fixing to timber
mm57.0otpu TMB
leetsotgnixiF
mm3ot>0.75 TMBr ebmitotgnixiF
tser C
dexif Hexheadselfdrillingselftapping
screwfortimber
Hexheadselfdrillingselftapping
screwfortimberwithhex.washer
head&EPDMseal
Hexheadselfdrillingselftappingscrewfortimberwithhex.washer
head&EPDMseal
Hexheadselfdrillingselftappingscrewwithhex.washer head fortimber
Hexheadselfdrillingselftappingscrew
withEPDMsealforthinmetalbattens
HexheadselfdrillingselftappingscrewwithEPDMsealandhex.washer head
HexheadselfdrillingselftappingscrewwithEPDMsealandhex.washerhead
andshankprotection
Hexheadselfdrillingselftappingscrew
withEPDMsealandhex.washerhead
14x31-31
&laesMDEP kprotectionnahs04x11-21
53x41-21
DOOWTFOS 05x11-21:
htiw & Shank protection
Shank protection
p i r g i H
DOOWDRAH 04X11-21:
htiw
yellaVdexif
61x61-01
laesMDPE&
02x21-01
61x61-01
DOOWTFOS 03x21-01:DOOWDRAH 02x21-01:
EASYCLAD
Hex head self drilling self tapping
screws with sealand hex.washer head
10-16x16
Hex head self drilling self tapping
screws with sealand hex.washer head
10-16x16
Hex head self drilling self tapping
screws for timber with sealand hex.washer head
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 19/70
3 F a s t e n e r s
DESIGN—FASTENERS 13
Table 3.8.1 continued
Guide to fasteners without insulation
Crest: 4 fasteners†
Clip Clip
KLIP-LOK406
LONGLINE305
Clip
Clip
YTIRGETNI
leetsotgnixiF
mm57.0otpu TMB
tser C
dexif
56x11-21 86x41-21
Hexheadselfdrillingselftappingscrewswith
EPDMseal,hex.washerhead, shankprotectionandIntegritysealingplate
Hexheadselfdrillingselftappingscrewswith
EPDMseal,hex.washerhead, shankprotectionandIntegritysealingplate
Donotfixscrews
less than25mm
fromthe end ofsheet.
Do not fix screws
less than 25mm
from the end of sheet.
Do not fix KL406 less than
75mm from end of sheet,do not fix Longline 305 sheets
less than 25mm from the
end of the sheet.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 20/70
Table 3.8.1 continued
Guide to fasteners without insulation
14 DESIGN—FASTENERS
Valley:11fasteners†
Valley: 6 fasteners†
Number of fasteners depends onwind pressure (see brochure on
this product).Do not fix screwsless than 25mm
from the end of sheet.
® ®
Valley: 3 fasteners†
Valley: 6 fasteners†
Number of fasteners depends onwind pressure (see brochure on
this product).
Do not fix screwsless than 25mm
from the end of sheet.
Valley: 4 fasteners†
DALCITLUM
leetsotgni xiFmm57.0otpu TMB
leetsotgni xiFmm3ot>0.75 TMB
rebmitotgni xiF
yella Vde xif
daeh-rehsaw.xehhtiw
02x21-01
daeh-rehsaw.xehhtiw
61x61-01 DOOWTFOS 03x21-01:
DOOWDRAH 02X21-01:
Self drilling self tapping screwsdaeh-rehsaw.xehhtiw
Self drilling self tapping screwsSelf drilling self tapping screws
Valley: 8 fasteners†
Valley: 4 fasteners†
Number of fasteners depends onwind pressure (see brochure on
this product).
Do not fix screwsless than 25mm
from the end of sheet.
BIRLENAP
leetsotgnixiF
mm2otpu TMB
r ebmitotgnixiF
yellaV
dexif daeh-rehsaw.xehhtiw
61x61-1010
DOOWTFOS & DOOWDRAH :
02X21-
Self drilling self tapping screwsdaeh-rehsaw.xehhtiw
Self drilling self tapping screws
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 21/70
3 F a s t e n e r s
DESIGN—FASTENERS 15
KEY
† Fasteners per sheet per support
S = Sid e -la p
Table 3.8.1 continued
Guide to fasteners without insulation
SValley: 4 fasteners†
Crest: 4 fasteners†
S
S
Crest: 3 fasteners†
Crest: 4 fasteners†
Valley: 3 fasteners†
Valley: 4 fasteners†
TRIMDEK
SPANDEKNumber of fasteners depends onwind pressure (see brochure on
this product).Do not place fasteners less than 25
from the end of sheets.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 22/70
Figure 4.1 .1Spring-curved-ridge roof
Figure 4.1Typical curved and bent applications
4
Curved, bent & taperedcladding
An excellent method of cladding low-slope gable roofs is
to run continuous lengths of roofing from eave to eave,
across t he full width of t he roo f. This g ives a pa rticularly neat
and at tractive roof. It is also po ssible to spring -curve sheet s
into a concave shape.
With the except ion o f KLIP-LOK, the ridg e capp ing is eliminated
in these roofs, thus avoiding any possibility of leakage along
the ridg e. KLIP-LOK can b e used similarly, b ut the ribs a re cut
at t he ridg e and a met al cap is fitted over the cut.
4.1 Spring-curved-ridge roof Sheet s in a sp ring -curved-ridge roof remain straight e xcept
for a curve near the ridge.
The p ans o f KLIP-LOK, INTEG RITY, LONG LINE 305 and TRIMDEK tend
to oilcan (minor w aviness in the pa n) when spring curved.Apart from not loo king g ood , a n oilcanned pan may retain
wa ter which could lead to discolouration and /or de terioration
of the sheet co ating a nd a lso contributes t o thermally induced
roof noise. If some oilcanning in the pans is acceptable, these
profiles ca n be spring -curved up to a maximum slope of 1 in 30
(2°); with the spacing between the purlins at the ridge being
slig htly less tha n the internal span reco mmend ed for the profile
in Tab le 2.3.1.
Over the supports at the ridge, very slight crease marks may
appear in the pans or valleys when subjected to foot traffic.
They do n’t affect strengt h and will usually not be seen fromthe ground.
Only the shee t p rofiles reco mmend ed for spring -curving are
sho wn in Tab le 4.1.1.
Fix each sheet is first fixed to one side of the roof, and then
pulled do wn to be fixed t o t he o ther side. To minimise sma ll
laying errors, lay alternate sheets from opposite sides of the roof.
Side laps should be sealed with silicone sealant for the length
of the curve.
16 DESIGN—CURVED , BENT AND TAPERED ROO FING
Capped bent ribbed roofs(for example KLIP-LOK)
Spring curved-ridge roof Sheets straight except fora curve near the ridge
Spring-arched roof Sheets curved in a radiusfrom eave to eave
Spring-curved concave roof Sheets curved concavely in a radius
Pre-curved roofingSheets curved by machine beforeinstallation
Spring curved-ridge roof
Sheets straight except fora curve near the ridge
Spring-arched roof Sheets curved in a radiusfrom eave to eave
Spring-curved concave roof Sheets curved concavely in a radius
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 23/70
4 C u r v e d , b e n t &
t a p e r e d
DESIGN—CURVED , BENT AND TAPERED ROO FING 17
Table 4.2.1Recommended radii for convex spring curving
Table 4.1.1Minimum spacing of purlins at ridge for spring curved-ridge roof (mm)
Figure 4.2.2 Seal length for side lapson spring-arched roof
At the crest of a n arch the roo f is flat , which is ob viously below
the sp ecified minimum roof pitch. Therefo re side laps should b e
sea led over the crest of the arch until there is sufficient pitch to
g ive a de q uate drainag e (see Tab le 2.3.1). The leng th o f sea l is
shown in Figure 4.2.2.
Over the supports very slight crease marks may appear in the
pans o r valleys when subjected to foot traffic. They do n’t affect
strength and will usually not be seen from the ground.
If end laps are necessary they should not be locat ed at or near
the crest of the arch and ea ch sheet leng th must span a t least
three purlin spacings.
Figure 4.2 .1Calculation of radius
4.2 Spring-arched roof
Sheets in a spring-arched (convex) roof are curved in a radiusfrom eave to eave. sPANDEK, CUSTOM ORB and CUSTOM BLUE ORB ca n
be spring-curved for an arched roof. Tab le 4.2.1 show s the
accepta ble rad ii.
The t op face of a ll purlins must accurat ely follow and be
ta ng ential to the rad ius of the arch. The radius of curvat ure can
be calculat ed from the formula in Fig ure 4.2.1.
R a d i u s
Seal lengthmeasured on roof
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 24/70
Table 4.3.1Radii for spring curved concave roofs
Figure 4.3 .1Spring-curved concave roof
4.4 Pre-curved roofsPre-curved co rruga te d roo fing is po pular for a esthe tics (such as
a bullnosed veranda h roo f), or for function (such as a g utte rless
eave design). CUSTOM BLUE ORB can be curved to a rad ius as smallas 300 mm. We d on’t reco mmend pre-curving for ot her profiles.
MINI ORB can be curved to a rad ius to as small as 150 mm, though
it isn’t recommended for roofing.
Beca use of the spacing of curving rolls, there is usually a straight
portion a t the end o f the sheet beyond the curve (often 50 to 110
mm for CUSTOM BLUE ORB , and about 50 mm for MINI ORB). Allow
for this in your de sig n. It ca n be trimmed off if necessary.
If a pre-curved section of cladding is to be joined to a straight
section, you should order the curved and straight sheet s at the
same t ime, a sking for them to be matched in production.
End-lap the she ets a s de scribed in Section 11.4 (End-lapping).
Our CUSTOM BLUE ORB brochure gives more details.
Profiles with wide pans manufactured from high tensile steel
(such as KLIP-LOK and INTEG RITY 820) are susceptible to local
buckling of the pans a nd a re the refore not recommended for
spring -arched roofs. These p roducts ca n be mad e spe cially from
soft steel (G300) to overcome the problem.
Each sheet is first fixed to one side of the roof, and then pulled
do wn to be fixed to the o ther side. Alternate sheets are laid from
oppo site sides of the roo f.
4.3 Spring-curved concave roofsRoofing can be spring-curved into concave shapes.
Tab le 4.3.1 shows t he a ccept ab le ra dii.
18 DESIGN—CURVED , BENT AND TAPERED ROO FING
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 25/70
4 C u r v e d , b e n t &
t a p e r e d
DESIGN—CURVED , BENT AND TAPERED ROO FING 19
4.5 Capped bent ribbed roofsTray clad ding can b e used in continuous leng ths from e ave t o
eave b y cutting the ribs and bend ing t he pans at the ridg eline.
The same process is used on Mansa rd roo fs. Cap s are fitte d o ver
the cut ribs, which open up when the pans are bent. Fitting the
rib caps can be time-consuming and care must be taken with
sealing to avoid any possibility of leakage.
The ribs must b e cut sq uarely, with a met al cutting b lad e in a
power saw, set to the depth of the rib minus 2 mm.
In some state s pressed stee l caps can b e o bta ined to suit
KLIP-LOK ribs, thoug h the rang e o f ang les is limited . Ca ps can be
handmad e to suit a ny angle from flat sheet.
KLIP-LOK is most frequently used for cap ped bent ribb ed roofs,
but LONG LINE 305, TRIMDEK or even SPANDEK can be used. For these
two profiles the rib caps can be made from pieces of rib profile
cut from a short length of cladding.
4.6 Tapered roofingWe can taper LONG LINE 305 in its width, at either end,
to produce a sheet that lends itself to a wide range o f roof
de signs. The m a ximum red uction in widt h is 50%. The t a pe r can
be left-hand or rig ht-hand (Fig ure 4.6.1). G et our ad vice for long
spans or high loadings.
Figure 4.5.1Capped bent ribbed roof
Figure 4.6.1Tapered LONGLINE 305
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 26/70
Figure 5.1 .1Heat transmitted into a building
You o ften co nside r insulat ing a building to reduce:
• heat ing f rom the sun in summer;
• loss of heat from inside in winter;
• condensation on the inside of the roofing and walling; and
• noise from rain, thermal expansion and contraction, and
other sources.
Usually, when one of these four is treated, there is also a
beneficial effect on the others.
You nee d t o co mpa re the initial cost o f installing insulat ion w ith
the sa ving s in costs of hea ting a nd co oling . There are also g ains
for the environment when you save energy.
AS 2627.1—1993 Thermal insulation of dwellings, thoroughly
treats the subject, including comprehensive tables of
recommend ed thermal resistance (R values) for over 1000 towns
througho ut Australia.
5.1 Heat controlIn summer building s g et ho t from the sun and w e w ant t o co ol
the inside; in winter we often hea t the inside and wa nt to avoid
losing tha t heat .
Factors in cont rolling hea t include:
• the orientation of the building relative to the sun;
• external shading from trees or other buildings;• design o f the building, especially ventilation and sealing
at doors and windows;
• the colours and surface g loss of the cladding.
The first three fa cto rs are o utside the sco pe o f this bo ok. Heat is
absorbed into a sheet o n one side, a nd some of that ab sorbed
hea t is re-rad iated from t he o ther side (Fig ure 5.1.1).
• Light-coloured o r shiny surfaces don’t ab sorb much heat,
and they radiate little.
• Dark-coloured or dull surfaces absorb a lot of heat,
and they radiate a lot. This doe sn’t stop you using da rkercladdings because you can use reflective foil laminate
under the cladding.
5
Insulation & skylights
20 DESIGN—INSULATION AND SKYLIGHTING
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 27/70
5 I n s u l a t i o n &
s k y l i g h t i n g
DESIGN—INSULATION AND SKYLIGHTING 21
Comparison of thermal performanceTa ble 5.1.1 show s therma l pe rforma nces o f different insulation
systems by showing the heat that ma y be expecte d through roofs
of new materials.
Heat control methodsIn roofs, a simple, inexpensive a nd very effect ive met hod is to
drape a membrane of reflective foil laminate over the supports
be fore laying the clad ding. The laminate ca n also provide a
vapo ur barrier to minimise co nde nsation. If the memb rane is
allowed to drape 50 to 75 mm between the supports the air
space b etwe en the memb rane and the roof clad ding will further
improve he at insulation (Fig ure 5.1.2).
Add itional hea t insulat ion is ofte n a chieved by using b ulk
insulation blankets or batts (Figure 5.1.3).
The sa me p rinciples ap ply to w alls, thoug h the fo il is not drap ed .
5.2 CondensationWhen the air in a b uilding in conta ct w ith me ta l clad ding is
warmer than the cladding, water vapour (moisture) in the air can
condense o n the inside of the cladd ing.
Water vapour passes fairly freely through most building liningsinto the ceiling and wall spaces where it may directly contact
the clad ding .
Conde nsation can lead to d eterioration of building compo nents
and sta ining of ce iling and wa lls. If insulat ion b lankets o r ba tts
are we t, or even slig htly da mpened by conde nsation, its
efficiency is reduced markedly.
The amo unt of condensation depends upon the a mount of wat er
vapour in the air and this varies with climatic conditions. Activities
within a building can a dd substa ntially to the a mount of wa ter
vapour, and typical domestic situations include bathing,
showering, cooking, washing and drying clothes and dishes, and
breathing. It is essential to vent substantial amounts of water
vapour to outside the building.
Table 5.1.1 Approximate thermal transmission (for comparisons only)
Figure 5.1.2 Reflective foil laminate is simple,cheap and very effective
Figure 5.1.3 Typical roof insulation withfoil and blanket
Surfmist
Wilderness
Woodland Grey
Night Sky
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 28/70
• being careful abo ut design deta ils in valleys
(whe re heat te nds to b e reta ined ); and/or
• insulat ing the roof space to reduce the thermaldifferential. In tropical areas it may be better to
insulat e t he ce iling rather t han t he roo fing (which
can a lso red uce noise).
5.4 Insulation materialsTypical insulat ion ma te ria ls are reflect ive foil lam inate s,
insulation blankets or batts made from fibreglass,
and boa rds mad e from polystyrene. Remember
that the colour of clad ding a lso has a marked effect
(Section 5.1).
Foil laminatesFoil laminates reflect heat and can double-up as a
vapour barrier to control condensation. Where they are
used as a vapour barrier the joints between successive
strips are overlapped a bout 100 mm, and sealed with
a tape impervious to moisture.
Blankets and battsBlankets and batts minimise heat convection and are
availab le w ith the laminate bo nded to the fibreglass.
They a re also effe ctive in red ucing no ise.
Insulation blankets must be protected from moisture,particularly around the e dg es of the roof a nd even
more particularly at the b ott om e nd o f the cladding
where rainwate r run-off can be blown ba ck under a
low-pitched roof. If the blanket overhang s the b ott om
support, it ma y even come into conta ct with wat er in
the g utter, where the insulat ion w ill abso rb moisture
and remain damp for extende d pe riod s, thus lead ing to
det erioration of the coa ting o n the underside of the
roofing and reducing the effectiveness of the insulation.
Insulat ion b lankets up t o a nominal thickness of up to
100 mm for pierce-fixed cladding
and KLIP-LOK 700; a nd up t o 50 m m fo r KLIP-LOK 406 and
all other concealed-fixed profiles will compress
sufficiently over the roo f supports to allow normal
procedures to be used for fixing. However, you may
need to increase the length of fasteners slightly to
allow for the thickness of the compressed blanket
be tw ee n the clad ding a nd suppo rt, see Tab le 3.8.1.
Polystyrene boardsExpande d and extruded polystyrene is also used for
the same purposes a s blankets a nd b att s. The b oa rds
are more rigid a nd relat ively less compressible whichdema nd different fixing t o tha t mentioned a bo ve. Seek
ad vice from manufact urers of po lystyrene insulat ion.
To minimise t he risk of co nde nsat ion on t he und erside
of roo fing, a vapour barrier is often used t o prevent
conta ct o f wa rm moist air with the roo fing – reflective
foil laminate is comm only used.
To minimise t he risk of co nde nsat ion on t he und erside
of the laminate, the laminate must be draped between
roof supports so tha t the cold cladd ing is not in contact
with the laminate (except at the supports).
5.3 Noise reductionRain noiseTo red uce rain noise on me ta l roo fing, a n insulat ion
blanket can be placed over the foil laminate described
above, before laying the roofing. It is important that
the laminate is pulled tight enough to hold the blanket
hard ag ainst the underside of the roofing so as to
dampen the rain-induced vibration at the point of
impact. If the blanket is not hard against the roofing
the noise reduction will not be as g oo d.
For purlin spa cing s over 1200 mm: first lay w ire
mesh o ver the p urlins, tighte n and fix it, b efore laying
the membrane.
Thermally-induced noiseRoofing expands a nd contracts due to tempe rature
changes in the cladding, and particularly rapid changes
can be caused b y passing clouds or a strong breeze.
For example: if a passing cloud suddenly shades the
roof from the sun, the cladding temperature could drop
about 3°C after 30 seconds in shade and about 10°C
after 2 minutes in shade.
Therma lly-induced noise is cause d b y slipping a t
fasteners where the roof expands relative to its
suppo rts. The slipp ing is contro lled by t he friction
bet wee n the roof a nd its supports. When the sta tic
friction is overcome impulsively, sounds are produced
— sometimes as loud as a pistol-shot — the higher the
friction, the louder the sound.
The noise can b e reduce d b y:
• placing a material with low coefficient of friction
between the roofing and its supports (for example
PVC tape or strips of foil laminate);
• choosing steel supports rather than timber (lower
coefficient of friction);
• choosing light coloured roof ing;
• ve nt ing t he ro o f sp a ce ;
• including a n expansion joint (Section 10.5);
22 DESIGN—INSULATION AND SKYLIGHTING
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 29/70
5 I n s u l a t i o n &
s k y l i g h t i n g
DESIGN—INSULATION AND SKYLIGHTING 23
5.5 Insulation thicknessInsulation blankets and batts can cause cladding
to bo w o ut bet wee n the fasteners. To minimise this
problem, the maximum thickness of blankets and
ba tts should be 100 mm for pierce-fixed cladd ing
and KLIP-LOK 700; and 50 mm for KLIP-LOK 406 and all
other concealed-fixed cladding.
5.6 SkylightingOne o f the simplest met hods o f g etting nat ural lig ht
through a stee l roo f is the inclusion o f translucent
sheets which match the steel profiles.
It is preferab le to use profiled tra nslucent cladd ingin single widths so that they can overlap, and be
supported by, the steel cladding on both sides. It is
also preferable to position the lengths of translucent
clad ding at t he top o f a roof run so the high end can
lap under the capping or flashing a nd the low e nd can
overlap a stee l shee t. This is beca use the translucent
cladding will readily overlap a steel sheet but the
reverse is difficult.
Building reg ulations req uire a safety mesh to be fitted
under translucent cladding.
Because of its greater thermal expansion, translucent
cladding should be fixed using oversized holes and
sealing washers recommende d by the clad ding
manufact urer. When used with conce aled fixed
clad dings, ensure the fa steners do not p enetrate the
stee l clad ding. There a re translucent products a vailab le
that e asily accommoda te this. Don’t exceed t he
maximum support spacing specified by the translucent
clad ding manufact urer.
Skylig hting increa ses t he t ransmission of so lar he at .
G enera lly spea king , hea t tra nsmission is proportional to
light transmission, so the mo re sunlig ht tha t ente rs a
building the hott er it will be . Clear, uncoloured
fibreglass has good light transmission of about 65%but
this means on a typical summer day, with peak solar
radiation o f 850 W/m2, transmission through a clear
fibreg lass skylig ht w ould b e a bo ut 550 W/m2.
Translucent fibreg lass clad ding is a vailab le to mat ch
CUSTOM ORB, INTEG RITY 820, KLIP-LOK 406 and 700,
LONG LINE 305, SPANDEK and TRIMDEK. Polycarbonate
clad ding is also a vailab le fo r CUSTOM ORB and TRIMDEK.
Note: Use of transluscent sheeting may result in lowe rlimit stat e ca pa cities.
On KLIP-LOK roofs the translucent cladding should be
pierce-fixed.
Figure 5.6.1Placement of translucent sheets - pierce fixed decks
Figure 5.6.2 Placement of translucent sheets - concealed fixed decks
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 30/70
6.1 IntroductionThe de sign of roof drainag e a ims to p rote ct peo ple, property
and the building. A thorough design includes:
• The roofing material and its profile
• The pitch of the roof and any penetrat ions that
reduce the capacity of the profile to carry rain
efficiently to the gutters
• The catchment area of the roof, including g utters.
Adjacent roofs a nd w alls can a ffect t he cat chment,
but are not considered in this book.
• The gutters: their location (at ea ves or elsewhere:
Fig ure 6.1.1), cross-sectional area, a nd g radient
• The dow npipes: their cross-sectional area, q uantity
and locat ion relative t o t he g radient
• Disposa l o f wa ter from the downpipes
• O ve rflo w p re ca ut io ns
6.2 Design of drainage (eaves-gutter system)This section outlines a p rocedure for de sig ning the d rainag e o f a
roo f using an e aves-g utter system. It is assumed tha t t he g utters
will have a gradient steeper than 1:500. Box gutter systems can
be more comp lex and a re thoroughly trea ted in AS/NZS
3500.3.2:1998.
1. Decide on the average recurrence interval (ARI). Where
significant inconvenience or injury to people, or damage to
property (including contents of a building), is unlikely (typical
of a n ea ves-g utte r syste m) a minimum ARI can b e 20 yea rs.
If these cond itions are likely (typical of box gutters) 100 years
is recommended .
2. Det ermine rainfall intensity for the site from Tab le 6.2.1.
More d at a are in AS/NZS 3500.3.2:1998.
3. Sketch a roo f plan showing d imensions in plan view, pitch of
roof, layout of ridges and valleys.
4. Check that the e ffective roof lengt hs don’t exceed the
capa city o f the roofing profile (Section 2.4).
6
Roof drainage
24 DESIGN—ROOF DRAINAG E
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 31/70
6 R o o f d r a i n a
g e
DESIGN—ROO F DRAINAG E 25
Table 6.2.1Design rainfall intensities
Figure 6.1 .1Typical gutters
5. Calculate t he catchment area of the roof from the plan.
To a llow for the slope o f the roo f, increa se the plan area by
1%for every deg ree of pitch up to 40° . For pitches o ver 40°
refer to AS 3500.3.2:1998.
6. G et the effective cross-sectional area o f the gutter you intend
to use fro m Ta ble 6.2.2.
7. Using the cross-sectional area o f the gutter on the graph in
Figure 6.2.2, determine the catchment area per downpipe.
8. Calculate (as a first te st) the minimum number of d ownpipes
req uired for the selected g utter using the eq uation:
Round the number o f do wnpipes up to the next w hole number.
9. On the plan, select locations for the downpipes and the
high points in the gutters. Where practical, the catchments
for each dow npipe should b e a bout e q ual in area; and a
hig h point should b e located at the bo ttom of any valleys
(Fig ure 6.2.3).
Calculate the area o f each catchment for each dow npipe.
10.Returning to the graph in Figure 6.2.2, with the area of your
ea ves gutter, check that t he catchment a rea for eachdownpipe, calculated in Step 9, is equal to or less than the
catchment area shown by the graph.
If a cat chment area is too big then you can:
• increase the number of downpipes;
• reposition the dow npipes and/or the high po ints;
• choose a gutter with bigg er effective cross-sectional
area, then repea t the abo ve from Step 7.
11. De cide on t he d ow npipe size. Recomme nda tions in AS/NZS
3500.3.2:1998 suggest that the area of round pipes should be
eq ual to the area of the g utter, whilst the area of sq uare o r
recta ng ular p ipes ma y b e 20% sma ller (Ta ble 6.2.2).
12.Consider measures to counter overflow of gutters into
the building.
6.3 Gutter fallInstall gutters with a generous fall to avoid ponding (which
reduces gutter life), but the fall should not be so steep as to be
ob vious to the casual o bserver. Typical fall on house g uttering is
ofte n abo ut 1:250 (12 mm in 3000 mm), thoug h a stee per fall of1:100 should g ive the g utte r a long er life.
Number of
do wnpipes (min.)
Tota l catchment area of the roof
Catchment area determined in (7)
=
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 32/70
Table 6.2.2 Gutter areas and downpipes
Figure 6.2 .2 Cross-sectional area of eaves gutters requiredfor various roof catchment areas (wheregradient of gutter is flatter than 1:500).(Ada pte d from AS 3500.3.2:1998)
Figure 6.2 .3 Locating high points and downpipes
26 DESIGN—ROOF DRAINAG E
Gutter
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 33/70
7 C a r e & h a n d l i n g
CARE AND HANDLING 27
7.4 Walking on roofsIt is important tha t yo u wa lk on roo fing carefully,
to a void d ama g e to either the roofing o r yourself.
G enera lly, keep yo ur weight evenly distribute d o ver
the soles of both feet to avoid concentrating your
weight o n either heels or toes. Alwa ys wear smoot h
soft-soled shoes; avoid ribbed soles that pick up and
hold small stones, swarf and other objects.
When you walk parallel to the ribs:
• for ribbed roofing walk on at least two ribs or
corrugations (CUSTOM ORB, CUSTOM BLUE ORB
and SPANDEK);
• fo r pan-type roo fing walk in the pans
(LONG LINE 305, KLIP-LOK 406, KLIP-LOK 700,
KLIP-LOK 700, TRIMDEK, INTEG RITY 820).
When you w alk across the ribs, w alk over or close to
the roofing supports.
Be ca reful when moving bet wee n supports. Do not
walk in the pan immediately adjacent to flashings ortranslucent sheeting. Walk at least one pan away.
Alwa ys take particular care when w alking on w et
or new ly laid sheet s — pa rticularly on ste eply
pitched roofs.
If there w ill be hea vy foot traffic on a roof, provide
a tempo rary walkway or working platform to
minimise da mag e.
7.5 Marking out, cutting and drilling
Marking outA pencil of any colour may be used except black or so-
called lead pencils. Do n’t use b lack pencils to mark
roo fing or wa lling beca use the g raphite content ca n
create an electric cell when wet and thus cause
de te riorat ion of t he finish. You ca n a lso use a string line
with chalk dust, or a fine, felt-tipped marker.
CuttingWhere possible, you should minimise site-work by
using sheets cut to length in the factory.
For cutting thin metal on site, we recommend
that yo u use a pow er saw with a met al-cutting b lad e
because it produces fewer damaging hot metal
particles and leaves less resultant burr than does a
carborundum disc.
7
General care, safety
and handling7.1 Safety It is commo nsense to wo rk safely, prote cting yo urself
and workmate s from a ccidents o n the site. Sa fety
includes the practices you use; as well as personal
prote ction of e yes a nd skin from sunburn, and hea ring
from noise.
Occupational health a nd safet y law s enforce sa fe
wo rking cond itions in most loca tions. Law s in every
state require you to have fall protection which includes
safety mesh, personal harnesses and perimeterguardrails. We recommend that you aquaint yourself
with all local codes of safe practice and you adhere
strictly to a ll law s tha t a pply to yo ur site .
7.2 Care and storage before installationRain or condensation is easily drawn between the
surfaces of stacked sheets by capillary action, or they
can b e d riven in by wind. This trappe d mo isture canno t
evaporate easily, so it can cause deterioration of the
coating which may lead to reduced life-expectancy or
poor appea rance.
If materials are not required for immediate use, stack
them neatly and clear of the ground. If left in the open,
protect them with wate rproo f covers.
If stacked or bundled product become s wet, sepa rate it
without delay, wipe it with a clean cloth and stack it to
dry t horoug hly.
7.3 Handling cladding on siteOn large building p rojects yo u can reduce hand ling
time by lifting bundles w ith a crane d irect from the
delivery truck onto the roof frame. Use a spreader
ba r for long sheet s. For small to med ium size projects,
without me chanical handling facilities, you ca n unloa d
sheets by hand and pass them up to the roof one
at a time.
For personal safety, and to protect the surface finish,
wear clean dry gloves. Don’t slide sheets over rough
surfaces o r over each o ther. Always carry too ls, don’t
drag them.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 34/70
7.8 Strippable coatingsTo p rovide tem pora ry prot ection d uring production,
handling and transport, some COLORBOND® products
are co at ed with a plastic. This coa ting pe els off easily
whe n new, b ut it has a relat ively short life, e specially
in sunlight. If you don’t remove this coating at the time
of installat ion, yo u may find it very hard t o remo ve
later on.
Please dispose of the plastic in an e nvironmenta lly
responsible manner.
7.9 Sealants
Recommended sealantsNeutral-cure silicone sealants have been successfully
used with the range of steel finishes on our roofing
and walling; a nd o n flashings, capp ings, a nd g utters
mad e from the same ma terials as the clad ding .
Neutral-cure silicone sealants:
• have goo d adhesion to the c lean surface of a ll our
roofing and walling;
• are water resis tant and non-corrosive;
• are resis tant to extremes of heat and cold while
retaining g oo d flexibility;
• provide hig h resistance to ultra-violet rays (sunlig ht);
a nd
• have a long service lif e.
It is important that only neutral-cure silicone be used
with sheet steel. Other silicone sealants, often have
a vineg ar or ammonia smell, and g ive off ag g ressive
by-prod ucts during curing which are de trimenta l to
sheet stee l.
If in doubt , loo k for a messag e o n the sealant pa ckag e
like: Suitable for use with galvanised and ZINCALUME®
steel products.
Cleaning surfacesFor effective bonding, all surfaces must be clean, dry
and free from contaminants such as old sealant or oil.
Mineral turpentine is suita ble fo r clea ning the surface s
but care must be ta ken to completely remove all
residual solvent with a clean dry cloth. White spirits is
an alternative.
Sealant must be applied o n the same da y as thesurface is clea ned .
Cut mate rials over the g round and not o ver other
materials where hot particles can fall and cause
damage to finishes—especially COLORBOND® prepainted
finishes. It is best to have the exterior colour finish of a
COLORBOND® prepainted sheet facing down, however
you must the n prote ct the pa int finish from scrat ching
by yo ur work supports.
If you have to cut materials near sheets already
installed, mask them or direct the stream of hot
particles away.
Reciproca ting nibb lers are a lso w ide ly used in the
roofing trad e, a nd the y produce a n excellent cut. The
resulting small, sharp scraps can rust and damage
finishes; a nd the y ca n ca use p ersona l injury. Takespecial care to collect these scraps.
Making holesHoles are often made by drilling or cutting by hole saw
or jig saw. Mask the area a round the hole to protect
paint from damage by swarf.
7.6 Clean upSwarf (metal scraps or or abrasive particles resulting
from cutting a nd d rilling ) left on t he surfaces o f
mat erials will cause rust stains which can lead to
reduced life of the material.
• Sweep or hose all metallic swarf and other debris
from roof areas and gutters at the end of each day
and at the co mpletion of t he installation.
• If swarf has become stuck on a f inish, it can be
removed . Take g reat ca re not to remove the p aint
or the metal coatings.
• For critical applications inspect the job tw o wee ks
after completion, when rain or condensation will
have caused any remaining swarf to rust, and thus
hig hlig ht a ffected areas.
7.7 Warn other contractorsMany stains arising from swarf do so, not from the work
of roofing-installers, but from o ther contract ors working
on the job . Similarly, problems can a rise from conta ct
with incomp at ible ma terials, like copp er piping or
chemically trea ted timber. Acid clea ning of bricks ca n
also be a proble. Architects a nd b uilders need to be
aware of this, and warn contractors accordingly.
28 CARE AND HANDLING
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 35/70
7 C a r e & h a n d l i n g
CARE AND HANDLING 29
Figure 7.8.1Typical joints with sealant
Sealant clean upWith practice you will be able to judge the size of
bea ds thus avoiding sq ueeze-out and the subseq uent
need to clean up.
Uncured sealant can b e removed with a clean, dry rag
and any excess then removed with a cloth lightly
da mpene d w ith mineral turpent ine o r white spirits.
Excess cured sealant is best removed with a plastic
spatula t o a void d ama g e to the surface finish of
the metal.
Avoid any unnecessary smearing of sealant on
surfaces intended for painting as silicone can affect
adhesion of paint. Smeared sealant may be treated
by lightly abrading the area with a non-metallicscouring med ium.
7.10 MaintenanceFactors that most affect the long life of a roof (or wall)
are original design, the environment of the installation,
and the maintenance of the installation. Maintenance is
probab ly the bigg est factor.
Maintenance includes:
• Reg ular inspection for problems before they
become major corrosion sites;
• Regular washing down, especially near coastal or
industria l influence s;
• Removal of leaves and other debris from gutters ;
• Keep walls free of soil, concrete and deb ris near
the ground;
• Don’t overspray pest ic ide .
Joint strengthSeams sealed with sealant should be mechanically fixed
for strengt h. Fastene rs in joints should g enera lly be no
further apart than 50 mm.
The sea lant do es no t req uire sig nificant ad hesive
strengt h in itself, but it must bo nd p ositively to all the
surface s it is to sea l. To ensure comp let e sea lant cure,
the width of sealant in a lap should not exceed 25 mm
when compressed (Figure 7.8.1).
Applying sealantAlways apply the bead of sealant in a continuous line
along the centreline o f the faste ner holes. This ensures
that, when compressed, the sealant positively seals
the fastener.
Be ca reful not to entrap a ir when ap plying sealant.
Especially, don’t place a ring of sealant around fastener
holes because entrapped air compresses during
tightening o f fasteners, and ma y blow a channel
throug h the sea lant, w hich could prevent t he fastener
from b eing sealed.
FastenersUse solid or sealed fasteners, otherwise you have to
apply sealant to the hollow centre of open blind rivets.
To preserve the life o f your clad ding, is very impo rtantthat fastener mate rials are compat ible with the
cladding (Section 2.10).
ProcedureThe p referred proced ure for lap fa brication is:
1. Assemble, clamp and d rill;
2. Separate compo nents and remove drilling deb ris;
3. Clean joint surfaces as recommended ab ove;
4. Apply bead (s) of sealant;
5. Relocate components and fix;
6. Externally seal ea ch fast ener if hollow b lind rivets
are used.
To p revent p rema ture curing (which cause s poo r
bo nding), finish the joint a s soo n as p ractical after
ap plying t he be ad s of sealant. The manufact urer’s
specified sealant open times should be followed.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 36/70
Maintenance of COLORBOND® prepainted steelThe p aint system on COLORBOND
® stee l sheet is very
durab le. Simple maintena nce o f the finish enhance s its
life and maintains attractiveness for longer periods.
Where the pa int finish is nat urally wa shed by ra inwa ter
(roofs, for example) there is usually no additional
maintenance needed. However areas to be washed
include soffits, wall cladding under eaves, garage
doo rs, and the underside o f eave g utters.
Washing should be done at least every six months and
more frequently in coastal areas where sea spray is
prevalent, and in area s where high levels of industrial
fallout occur. Avoid a ccumulat ion o f salty de po sits o r
industrial dirt.
Esta blish a regular routine fo r wa shing COLORBOND®
prepainted steel products. Often garage doors can be
washed with clean w ate r at the same time a s your car is
being washed. G uttering a nd eaves can be hosed
dow n when window s are being cleaned . Walls can be
hosed down while watering the garden.
Where regular maintenance doesn’t remove all the dirt,
wash the surface with a mild solution of pure soap or
non-ab rasive no n-ionic kitchen de te rg ent in wa rm
water. Use a sponge, soft cloth or soft bristle nylon
brush; be g entle to prevent shiny spots. Thoroug hly
rinse off the de tergent w ith clean w ate r.
Never use abrasive or solvent cleaners (like turps,
pet rol, kerose ne a nd p aint thinners) on COLORBOND®
steel surfaces. For advice on grease, oil or deposits
not removed by soap or detergent contact our
Information Service
30 CARE AND HANDLING
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 37/70
8 P i e
r c e - f i x i n g
INSTALLATIO N—PIERCE-FIXING 31
Figure 8.1.1Lay sheets towards prevailing weather
Figure 8 .1Crest and valley fixing
8
Installing pierce-fixedcladding
Pierce-fixing is the met hod of fixing sheet s using faste ners
which pass through the shee t. This is different fro m the
alternative method called concealed-fixing (Chapte r 9).
The me thod of fixing you use is de termined b y the cladd ing
profile you a re using .
You ca n place screw s throug h the crests or in the valleys,
however, to maximise watertightness, always place roof screws
through t he crests. For wa lling , you ma y fix through e ither the
crest or valley (Figure 8.1).
Always drive the screws perpendicular to the cladding, and in the
centre of the corrugation or rib.
The follow ing proced ures a re describe d fo r roo fs, but the same
g enera l principles ap ply to w alls.
8.1 General installation procedureCheck flatness, slope and overhangBefore starting work ensure that:
• the supports for your cladd ing are truly in the same plane;
• the minimum roof slopes conform to Section 2.5
(Low roof pitches); a nd
• the overhangs o f sheets from the top and bo t tom
supports d on’t exceed tho se in Tab le 2.3.1, whilst a lso
overhanging at least 50 mm into gutters.
Make any necessary adjustments before you start laying sheets,be cause they will be difficult o r impo ssible t o rectify late r.
Orient sheets before liftingFor maximum weather-tightness, start laying sheets from the end
of the b uilding that will be in the lee of the worst-anticipat ed or
preva iling w ea the r (Fig ure 8.1.1).
It is much easier and safer to turn sheets on the ground than up
on the roof. Before lifting sheet s on to t he roof, check that t hey
are the co rrect w ay up a nd the overlapping side is towards the
ed g e o f the roo f from w hich installat ion w ill sta rt.
Place bundles of sheets over or near firm supports, not at midspan of roof memb ers.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 38/70
Figure 8.1.2 Check alignment occasionally
Position first sheetWith p articular ca re, po sition the first sheet be fore fixing
to ensure that it is correctly located in relation to other parts
of the building . Check that the sheet:
• is aligned with the end-wall (or its barge o r fascia),
bearing in mind the type of flashing or capping treatment
to be used; and
• aligns correctly at its ends in relation to the g utter
and ridge (or parapet or transverse wall). Roof sheets
should overhang at lea st 50 mm into g utters.
Fix the shee t a s de scribe d lat er in this chapt er.
Position other sheetsAfter fixing the first sheet in position, alig n the follow ing
sheets using:
• the long edge o f the previous sheet ; and
• a measurement from the end of the sheet to the fascia or
purlin at the gutter. It is important that you keep the
g utter-end of a ll sheet s in a st raight line.
Fix the shee t b y either:
• f ixing each sheet completely, before laying the next; or
• f ix the sheet sufficiently to ensure it can’t move, complete
laying all sheets, then return to place all the intermediate
faste ners lat er.
Check alignment occasionallyOcca siona lly check that t he shee ts are still pa rallel with the first
sheet, by t aking two measurements a cross the w idth o f the fixed
clad ding (Fig ure 8.1.2).
At about half way through the job, perform a similar check but
ta ke t he me asurements from the finishing line to aim for the final
sheet to be parallel with the e nd o f the roof. If the mea surements
are not close enough, lay subsequent sheets very slightly out of
parallel to gradually correct the error by:
• properly a lign and fix a lap, then
• f ix the other edge of the sheet , placing the fas teners
slig htly close r or further from where they wo uld normally
be if there wa s no error.
32 INSTALLATIO N—PIERCE-FIXING
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 39/70
8 P i e
r c e - f i x i n g
INSTALLATIO N—PIERCE-FIXING 33
Figure 8.2 .2 Clamp one end of the sheet whilst fixing the other end.
Figure 8.2.1Crest fixing
8.2 Side-lapping & positioning pierce-fixed
sheetsTo prevent moisture b eing d rawn into laps b y capillary act ion,
the e dg es o f sheets are slig htly mod ified. CUSTOM ORB and
CUSTOM BLUE ORB have the edg es o f the sheet over-curved,
ot her prod ucts like SPANDEK, TRIMDEK, INTEG RITY 820 all have flutes
formed into the underlapping rib. It is important that sheets be
lapp ed correct ly (Fig ure 8.2.1).
After fixing the first sheet, p lace the next (and subseq uent)
sheet with its side lap snug ly over the previous sheet
(Fig ure 8.2.1). Secure the shee t firmly in place until ea ch end
of the sheet has b ee n fixed. You ca n do this easily by:
• a lign the bottom edge a ccurately by a measurement f rom
the end of the sheet to t he fascia o r purlin at t he g utter;
• clamp the lap with a pa ir of vice g rips (Fig ure 8.2.2);
• a t the top of the sheet : nest le the s ide lap snugly,
check alignment, and fix the sheet with a fastener.
8.3 Pierce-fixing on crestsCrest fixing is recommended for roofs made from:
• CUSTOM ORB
• CUSTOM BLUE ORB
• SPANDEK
• TRIMDEK
• INTEG RITY 820
Crest fixing may also be used for these products when they are
used as walling.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 40/70
8.4 Pierce-fixing on valleys (for walling only)Wall fasteners may be placed on the crests, but they are usually
placed in the valley of wall cladding because:
• they are less conspicuous and don’t break the aesthetic
lines of the steel cladding;
• there is no risk of the profile being d eformed,
beca use t he fastener is placed throug h the cladding
where it rests flat against its support (Figure 8.4.1); and
• wa ter penetra t ion is no t a prob lem.
Howe ver, whe n valley-fixed, t he cladd ing need s a side -lap
fast ene r in all laps, a t e ac h suppo rt. You w ill find it mo re
economical in labour, time and cost of fasteners to use a crest
fastener at e ach side lap in place o f the lap fa stener and a djacent
valley fast ene r (Fig ure 8.4.2).
8.5 Pierce-fixing on side-lapsWhere roofing and w alling a re installed a ccording to t he support
spa cings sho wn in Ta bles 2.3.1 and 2.3.2, side -lap fa ste ners are
generally not required.
You ma y need to use side -lap faste ners where the clad ding is laid
a little out o f alig nment and the we ather resistance o f a joint is
q uestionab le. De cide on the number of side-lap fasteners bywha t loo ks effective in each individua l case.
Where valley fasteners are used, you need side-lap fasteners
along each lap at each support. Alternatively a crest fastener may
be used at each side-lap, in place of the side-lap fastener and
ad jace nt valley faste ner (as ment ione d a bo ve in Section 8.4).
Side-lap fasteners are located in the centre of the crest of the
overlap ping co rruga tion (Fig ures 8.4.1 and 8.4.2).
8.6 Installing MINI ORB
A little extra care is neede d with MINI ORB to g et the best
appea rance. Detailed notes are in our brochure on MINI ORB.
Figure 8.4.2 Alternative valley fixing with crest fixing at side laps(for walls only)
Figure 8.4 .1Typical valley fixing (for walls only)
34 INSTALLATIO N—PIERCE-FIXING
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 41/70
9 C o n c e a l e d - f i x i n g
INSTALLATIO N—CONCEALED-FIXING 35
Figure 9.1.1KLIP-LOK clips
9
Installing concealed- fixed cladding
Concealed-fixing is the method of fixing sheets using fasteners
which do not pass through the sheet. Instea d, t he clad ding is
held in place with clips. This is different from the alte rnat ive
met hod ca lled pierce-fixing (Cha pt er 8). The me tho d o f fixing
you use is determined by the cladding profile you are using.
Co ncea led-fixing is used for:
• KLIP-LOK 700
• KLIP-LOK 406
• LONG LINE 305
• EASYCLAD
Very steep pitchesTo prevent concea led -fixed cladd ing from sliding d ow nwa rd in
the fixing clips, on very steep pitches, you should pierce-fix
throug h each sheet under the flashing o r capping, a long the to p
of the sheets.
9.1 Installing KLIP-LOK roofsUse the same general procedure described in Section 8.1
(General installation procedure). However, at t he start of
installing KLIP-LOK 406, KLIP-LOK 700 and KLIP-LOK 700, a row o f clips
is fixed to the supports before the first sheet is locat ed over
them and locked in position.
Clips
For KLIP-LOK 700 use 700 clips.For KLIP-LOK 406 use KL65 clips.
The o rienta tion of the clips is important b eca use they a re not
symme trical (Fig ure 9.1.1).
The fixing h oles a re pre-punched . O n KL65 and KL75 clips you
can use the dimples to locat e o ther fasteners where a faste ner
brea ks or a timber support sp lits.
Shortened 1st clip
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 42/70
Figure 9.1 .2 Fix the first row of clips
PreparationAs described in General installation procedure (Section 8.1):
• check f la tness , s lope and overhang;
• orient the sheets before lif ting. Note the overlapping rib
is tow ards the end of the building where you start
(Fig ure 9.1.3);
• Check that the overhang of the sheets from the clips,
at bo th ea ves and ridg e, is not less than the minimum
in Ta ble 2.3.1.
• The first and last supports and clips should b e at least
75mm from e ach end of the sheet to keep maximum
holding power.
Position the first sheetWith p articular ca re, po sition the first sheet be fore fixing ,
to e nsure tha t it will correctly loca te in relat ion to ot her parts
of the building . Check that the sheet:
• is aligned with the end-wall (or its barge o r fascia),
bea ring in mind the type o f flashing or capping t reat ment
to be used; and
• aligns correctly at its ends in relation to the g utter and
ridg e (or pa rapet or transverse wa ll). Roof sheet s shouldoverhang at least 50 mm into g utters.
Fix the first clipsKLIP-LOK 700
Starting method 1. Cut t he 1st clip 25 mm from t he ce ntre of t he
second to we r (as sho wn). The first to we r on t he cut clip loca tes in
the 1st rib of the first she et (Fig ure 9.1.2). This metho d is
preferred beca use you don’t have t o reach so fa r to fix the
remot e e nd of t he clip.
Starting method 2. The first to we r on the first clip loca te s in thefirst rib of t he first sheet (Fig ure 9.1.2). The clip fixes the e dg e
of the first sheet, but you must fix two clips at the start, and thus
reach out further for the first and all subsequent sheets.
The fo llow ing d escription is for Met hod 1.
ALL KLIP-LOK PROFILES
Fix the first clip on the purlin nearest the gutter, with the clip
po inting co rrectly in the d irection o f laying (Fig ures 9.1.1 and
9.1.2). Be sure the clip is 90 deg rees to the ed g e of the sheet.
Using a string line (or the first sheet as a straight edge) to align
the clips a s you fix a clip to ea ch purlin wo rking to wa rds the highend o f the roo f.
36 INSTALLATIO N—CONCEALED-FIXING
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 43/70
9 C o n c e a l e d - f i x i n g
INSTALLATIO N—CONCEALED-FIXING 37
Figure 9.1.5 Clip engaged over rib of installed sheet
Figure 9.1.4 Flatten spurs in way of clips
Figure 9.1.3 Placing the first sheet
Place the first sheet1. Loca te t he first sheet over the fixed clips (Fig ure 9.1.3).
2. Using a measurement from the g utter-end of the sheet to the
fascia or purlin, position the sheet so that it overhangs the
de sired a mount into t he g utter (usually ab out 50 mm). It is
important that you keep the gutter-end of all sheets in a
straight line.
3. KLIP-LOK 406: If a spur on the ed g e of a KLIP-LOK 406 sheet fouls
a clip, flatt en the spur with a rubber ma llet to allow the clip to
sit down over the rib (Figure 9.1.4).
ALL KLIP-LOK PROFILES: Fully engage the sheet with the clips,
using vertical foo t pressure o n all the ribs over ea ch clip.
Fix the next (and subsequent) clips and sheets1. Fix the next row of clips, one to each support. Be sure the clip
is 90 deg rees to the edg e of the sheet, and the embossed
arrow on the clip p oints in the co rrect direction (Figure 9.1.1).
KLIP-LOK 700: Eng ag e the slots and ta bs on the clips.
KLIP-LOK 406 & 700: Engage the clips over the rib of the installed
sheet (Fig ure 9.1.5). If a sp ur on the e dg e o f the she et fouls a
clip, flatten the spur with a rubber mallet to allow the clip tosit down over the rib (Figure 9.1.4).
2. As before, place t he next sheet o ver its clips also eng ag ing
the edg e o f the preceding sheet.
3. Accurately position the sheet so tha t it overhangs the de sired
amount into the gutter. It is important that you keep the
g utte r-end of a ll sheet s in a straight line.
K L 6 5
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 44/70
Figure 9.1 .8 Check alignment occasionally
Figure 9.1.7
Engaging edges of sheets
4. Fully engag e the two sheets along the o verlapping rib.
You ca n do this by w alking along the full leng th o f the shee t
with one foot in the centre pa n of the previous sheet a nd the
other foot app lying vertical pressure to the to p of the
interlocking ribs at regular intervals. It is important tha t yo u
do n’t wa lk in the unsupported pan b eside the o verlap
(Fig ure 9.1.7). A rubb er mallet ma y help eng ag eme nt of laps
on long spans.
5. Similarly, eng ag e a ll the clips by a pplying vertical foot
pressure to the top of the other ribs over each clip.
It is essent ial tha t t he she ets interlock completely. It is impo rtant
tha t yo ur weight is fully on t he shee t yo u are insta lling .
KLIP-LOK 406 & 700: The spurs on the free e dg e o f the unde rlap pingrib must be fully engaged in the shoulder of the overlapping rib
(Fig ure 9.1.7). You w ill hea r a d istinct click a s the spurs sna p in.
Check alignment occasionallyOcca siona lly check that the sheet s a re still parallel with the first
sheet, by t aking two measurements a cross the w idth o f the fixed
clad ding (Fig ure 9.1.8).
At about half way through the job, perform a similar check but
ta ke t he me asurements from the finishing line t o a im for the finalsheet to be parallel with the e nd of t he roof. If the mea surements
are not close enough, lay subseq uent sheets very slig htly out of
pa rallel to g radua lly correct the error. To a llow this to ha ppe n,
flatt en the tab s on the ba se of subseq uent clips—the slot in the
clip w ill allow the clips to be fixed o ut of st and ard p itch.
Place the last sheetKLIP-LOK 700: If the final space is less than the full width
of a sheet, you can cut a sheet a long its leng th and shorten
the clips as appropriate.
38 INSTALLATIO N—CONCEALED-FIXING
Spurs on edge of bottomsheet must be fully engagedin shoulder of top sheet.
Don't step in this panuntil ribs are engaged
KLIP-LOK 406
KLIP-LOK 700
Later checks =
Fixed sheets
Early checks = Later checks =
Early checks =
S t a r t
F i n i s h
Purlin
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 45/70
9 C o n c e a l e d - f i x i n g
INSTALLATIO N—CONCEALED-FIXING 39
Figure 9.1.10 KLIP-LOK 406
Placing last sheet wherehalf a sheet won’t fit
Figure 9.1.9 KLIP-LOK 406Placing last sheet wherehalf a sheet will fit
KLIP-LOK 406 & 700: If the final space is more tha n half the w idt h
of a sheet, you can cut a sheet a long its leng th leaving the centre
rib comp lete (Fig ure 9.1.9). Place the cut sheet o nto a row o f
clips, as for a full sheet.
If the final space is less tha n half the w idth of a sheet , fix the
edg e o f the sheet at each purlin, with a clip tha t has b een cut in
half (Fig ure 9.1.10). Co ver the g ap with the ca pping o r flashing.
9.2 Installing KLIP-LOK wallsThe insta lla tion proc ed ure for wa lls is simila r to tha t d escribe d
for roo fs (Sect ion 9.1). To e ng ag e clips, use a rubb er ma llet
(instea d of foo t pressure).
To prevent KLIP-LOK from sliding do wnw ard in the fixing clips,
you should pierce-fix throug h ea ch sheet under the flashing o r
capping, along the top of the sheets.
K L 6 5
Sheet cut longitudinally
leaving full centre rib intact
K L 6 5
Sheet cut longitudinallyleaving full centre rib intact
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 46/70
Figure 9.3.2 Using a clip to start
Figure 9.3 .1Using a trim channel to start
9.3 Installing EasycladYou ca n use EASYCLAD for walls, soffit linings or ceilings. Use a
similar installation procedure for all.
EASYCLAD 2PF300 (2 pans per sheet) and 4P300 (4 pans pe r sheet)
are pierce-fixed through the underlapping e dg e o f ea ch sheet.
The fasteners in one sheet a re concea led by the lead ing e dg e o f
the next. For the last sheet, a trim channel is used.
If you are using EASYCLAD with the ribs horizontal, start installing
from the b ott om o f the wa ll so that the joints bet wee n panels
te nd to shed w at er (Fig ure 9.3.6).
You ca n use either of two metho ds to fix the first pane l: a C D39
trim channel or CD40 starting clips.
Start method 1 – Using a trim channelWith pa rticular ca re, fix a trim channe l at e ach supp ort.
Be careful to locate it correctly in relation to other parts of the
building (see Section 8.1 Position first sheet).
• Use t rim channel CD1 with EASYCLAD 4P300.
• Use trim channel CD39 with EASYCLAD 2PF300.
The first EASYCLAD pa nel is held in place by fitting it into t he fixed
trim channe l (Fig ure 9.3.1).
Start method 2 – Using clipsWith pa rticular ca re, fix starting clips a t e ach supp ort. B e ca reful
to locate them correctly in relation to other parts of the building
(see Section 8.1 Position first sheet).
Hook the lip o f an EASYCLAD sheet under t hese clips (Fig ure 9.3.2).
40 INSTALLATIO N—CONCEALED-FIXING
Support
Recommendedfastening
T r
i m
c h a
n n e l
Support
Trim channel Easyclad panel
Support
Easyclad panelCD40 Starting clip
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 47/70
9 C o n c e a l e d - f i x i n g
INSTALLATIO N—CONCEALED-FIXING 41
Figure: 9.3.5 Using trim channel to finish
Figure 9.3.6 Start external walls from the bottom
Figure 9.3.4 Starting for subsequent sheets
Figure 9.3.3 Indents on edge of sheet help to locate screws
Fixing Easyclad panelsLoca te the first pa nel either in its trim cha nnel or unde r the clips
(depe nding on the start method you used).
Fix the underlapping side of the panel, to each support,
through the flat edge, with the recommended fastener
(Chapte r 3). The indenta tions along the e dg e help you locat e
the faste ners (Fig ure 9.3.3).
Fit subsequent panels by hooking the lip of your next sheet
under the folded-ba ck edg e o f the previous panel before fixing
in the sa me wa y a s b efore (Fig ure 9.3.4).
Usually the last EASYCLAD pa nel will have t o b e cut in width t o suit
the b uilding. The pa nel may req uire expo sed pierce-fixing . If you
use a trim channel at the end of the EASYCLAD walling, position it
and pierce-fix with the last pa nel (Fig ure 9.3.5).
Indentations to
locate screws
Support
Trim channel
Panelfastening
Last panel cut to width
Pierce fixingin valley
Support
Weather side Inside
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 48/70
Figure 9.4 .3 Place top fixing clips
Figure 9.4 .2 Placing first sheet
Figure 9.4 .1LONGLINE 305 clips
9.4 Installing LONGLINE 305 roofsFor LONG LINE 305 (standard width, fluted or tapered) use the same
general procedure described in Section 8.1 (General installation
procedure). However, at the start of installing LONG LINE 305, a ro w
of clips is fixed to the supports before the first sheet is located
over them and locked in position.
ClipsThe 2 clips are show n in Fig ure 9.4.1.
Preparation
Cut a ll starting /finishing clips and discard the unwant ed pieces(Figure 9.4.1).
As described in General installation procedure (Section 8.1):
• check f la tness , s lope and overhang, and
• orient the sheets before lif t ing. Note the overlapping
rib is towards the end of the building where you start
(Fig ure 9.4.2).
Fix the first row of clips
With pa rticular ca re, de te rmine the loca tion of t he first sheet and
mark the edge of the sheet on the purlins (see Section 8.1
Position first sheet).
Fix the first clip on the purlin. Using a string line (or the first sheet
as a straight edge) fix the other starting clips for the first sheet.
Place the first sheet1. Loca te the first sheet over the fixed clips (Fig ure 9.4.2).
2. Using a measurement from the g utter-end of the sheet
to the fascia or purlin, position the sheet so that it overhangsthe desired amount into the gutter. When setting the first
sheet, remember that it is important you keep the gutter-end
of all sheets at a constant distance from the e dg e of the
g utter or fascia.
3. Bend the t ab of a ll clips over the rib (Fig ure 10.4.3).
42 INSTALLATIO N—CONCEALED-FIXING
Top fixing clipStarting/finishing clip
Cut clip across big holeand discard section shown
with dashed line
Bend tab downover rib
Overlappingrib
Underlappingrib
D i r e c t
i o n o f
l a y i n g
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 49/70
9 C o n c e a l e d - f i x i n g
INSTALLATIO N—CONCEALED-FIXING 43
Figure 9.4.6 Lock all ribs with button punch
Figure 9.4.5 Placing subsequent sheets
Figure 9.4.4 Flatten rib for top fixing clips
Fix the next (and subsequent) clips and sheets1. Using t he rib closing t oo l, flat te n the rib of the first (previous)
sheet at each purlin where the top fixing clips will fit
(Fig ure 9.4.4).
2. Place top fixing clips over ea ch flatt ened rib a nd fix to the
purlins (Figure 9.4.5). With a felt-tipped pen, make a small
mark in the pan to enable you to locate the clips in the later
locking operation with the button punch (Figure 9.4.6).
3. Place the next sheet over the edg e of the preceding sheet,
(Figure 9.4.5). Accurately position the sheet so that it
overhangs the desired amount into the gutter. It is important
that yo u keep the g utter-end o f all sheets at a constant
distance from the edg e of the g utter or fascia.
4. Fully enga g e the sheet w ith the clips, using foo t pressure on
the ribs o ver each clip. You ca n do this by wa lking along the
full leng th of the sheet with one foo t in the tray next to t he
overlapp ing rib and the o ther foot app lying pressure t o the
to p o f the interlocking ribs a t reg ular intervals.
For walling applications use a rubber mallet instead of the weight
on your feet.
Check alignment periodicallyCheck alignment as described in Section 8.1 (General procedure).
Place the last sheetAssess how t he last shee t w ill fit as d escribe d fo r installat ion o f
KLIP-LOK (Figures 9.1.8 and 9.1.9).
Fix a cut st art ing/finishing clip to the purlins.
Place the last shee t o ver the sta rting /finishing clips, flat ten the rib
at each purlin, and bend the tab of all clips over the rib.
Lock all ribsAll lapped ribs must be locked along their length, by button
punching at no g reate r than 900 mm centres (Fig ure 9.4.6). You
must butt on punch throug h the hole in each to p fixing clip—you
loca te the clip w ith the p en ma rk mad e p reviously. When
ope rating the punching too l, stand on the pan o f the o verlapp ing
sheet to ensure that the sheets are fully engag ed.
3 0 m m
Ribmust touch
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 50/70
Figure 10.1.2 Turning-up CUSTOM ORB
Figure 10.1.4 KLIP-LOK tool ready for turn-up
Figure 10.1.3 Turning-up ( TRIMDEK shown)
10
Ends of sheets
This chapte r describe s how you ca n treat t he end s of sheets to
maximise waterproofing, or to stop vermin entering.
10.1 Turn-upsAt the high end of roofing, wind can drive water uphill, under the
flashing o r capp ing, into a b uilding . To m inimise this prob lem,
you turn up the valleys (or pa ns) at the hig h end of roo fing . The
process is called turning-up (or stop-ending).
All roo fing o n slop es b elow 1 in 2 (25°) should b e t urned -up.
Turn-up to ols are a vailab le for a ll our roo fing p rofiles e xcep t
CUSTOM ORB and LONG LINE 305 when it is ta pered (Fig ure 10.1.1 on
the next pag e).
You can t urn-up sheet s be fore or aft er they a re fixed o n the roo f.
If you do the lat ter, you must ha ve sufficient clea rance fo r the
turn-up tool at the top e nd of the sheets (ab out 50 mm).
Turning-up CUSTOM ORB
With pliers, multi-grips or a shifting spanner closed down
to a pproximately 2 mm, grip the valley corrugations 20 mm
in from the end of the sheet and turn up as far as possible
(Fig ure 10.1.2). Be ca reful not t o te ar the shee t.
Turning-up TRIMDEK and SPANDEK
Slide the turn-up tool onto the end of the sheet as far as it will
g o. Holding t he too l ag ainst the end of the sheet, p ull the handle
to turn up the tray a bo ut 80° (Fig ure 10.1.3).
Turning-up KLIP-LOK
You g et the b est results by first cutting o ff the corner of the
down-pointing leg of each female rib. Do this before you placethe sheets on the roo f.
• With the hinged turn-up tool open: position the tool on the
sheet with the locat ing p ins hard a g ainst the e nd of the sheet.
• Hold the handles together to c lamp the tool onto the tray,
and pull them t o t urn-up the t ray 90° (Fig ure 10.1.4).
44 INSTALLATIO N—ENDS OF SHEETS
C o m p le ted t u r n - u p s
CUSTOM ORB
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 51/70
1 0 E n d s o f s h e e t s
INSTALLATIO N—ENDS OF SHEETS 45
Figure 10.1.5 Using the backing tool for flush turn-up on KLIP-LOK
Flush turning-up KLIP-LOK
In normal turning-up of KLIP-LOK, the tops of the ribs protrude
past t he turned up tray. Conseq uently the turn-ups cannot be
positioned hard ag ainst a fascia o r wall, or the ends of the sheets
on either side of the ridg e ca nnot b e b utte d to g ethe r. This is
usually of no consequence because the turn-up is completelycovered by a flashing or capping. However, if you want the ribs
not to protrude past the turn-up, you can make a flush turn-up.
You nee d a n extra 40 mm in sheet leng th for flush turn-ups.
1. Cut the to p of ea ch rib b efore turning-up the p ans (Fig ure
10.1.5). Turn-up t he p ans a s de scribe d b efo re.
2. Position the ba cking to ol in the tray and hold it hard ag ainst
the turn-up with a foot.
3. With a rubb er mallet, fold the protruding ‘ears’ flush aga inst
the b acking too l.
Figure 10.1.1
Turn-up and turn-down tools
4 0 m m
'Ear' flattened
'Ear' awaitingflattening
SPANDEK
TRIMDEK
Turnup
LONGLINE 305
Turn-up &turn-down
INTEGRITY 820
Turn-up &turn-down
Turnup
Turndown Backing
tool
KLIP-LOK 406
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 52/70
Turning-up LONGLINE 305
Flush turn-ups are usually used on LONG LINE 305 . Cut off a portion
of the fe male rib fo r at least 50 mm. For a flush turn-up, you also
need t o cut the crown of the centre rib for at lea st 50 mm.
Holding the e nd of the too l ag ainst the e nd of the sheet, pull the
hand le up 90° . If turning -up flush, fold t he p rotruding ‘ea rs’ flush
ag ainst the turn-up to ol with a rubb er ma llet (Fig ure 10.1.6).
Figure 10.2.2 Turning-down the gutter end( LONGLINE 305 shown)
Figure 10.2.1Turning-down the gutter end( TRIMDEK shown)
Figure 10.1.6 Turning up LONGLINE 305
10.2 Turning-downAt the low end of roofing, wind or capillary action can cause
wa ter to run ba ck up the unde rside of the clad ding. To minimise
this prob lem, yo u turn dow n the valleys (or pa ns) at the low end
of roo fing. The p rocess is called t urning -do wn (or lipping).
All roo fing on slope s b elow 1 in 5 (10° ) must b e turned-dow n.
Turn-do wn t oo ls a re ava ilab le for all our roofing profiles exce pt
CUSTOM ORB, SPANDEK and tapered LONG LINE 305 . The valleys of
CUSTOM ORB corrugated cladding can be turned down with
multig rips, pliers o r a shifting spa nner (Fig ure 10.1.2).
Turning -do wn is usually do ne a fte r the clad ding is fixed on t he
roo f, provided there is no o bstruction to the o peration of the
turn-down tool.
• Push the turn-down too l over the end of the tray, as far as it
will go .
• Hold the tool hard ag ainst the end of the tray and push the
handle to form a t urn-do wn ab out 20° .
46 INSTALLATIO N—ENDS OF SHEETS
E d g e o
f s h e e t
t u r n e d -
d o w n
20°
50 m m
50 m m
90°
Fold 'ears' against toolfor a flush turn-up
Part of ribremoved
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 53/70
1 0 E n d s o f s h e e t s
INSTALLATIO N—ENDS OF SHEETS 47
Figure 10.2.3 Cut SPANDEK on low slopes.
Figure 10.3.3 Profiled closed-cell infill at eaves
Figure 10.3.2 Fitting rib end-stops afterinstallation of sheets
Figure 10.3.1Fitting rib end-stops duringinstallation of sheets
SPANDEK overlapsWhen SPANDEK is laid on slopes of 5 degrees or less, cut back
the co rner of the under-sheet, a t t he d ownhill end of t he sheet,
to bloc k cap illiary a ction (Fig ure 10.2.3).
10.3 Blocking off rib cavitiesDust, insects, b irds, rod ents a nd w ind-driven rain can ente r
a building through the cavities und er ribs. To minimise t hese
problems the cavities can be blocked off. Rib end-stops are
availab le for KLIP-LOK; strips of plastic foam ca n be used for
ot her p rofiles.
Fitting KLIP-LOK rib end-stops during sheet installationFix the rib end-stops to the side of the eaves support after the
KLIP-LOK clip ha s be en se cured in position. Alig n the rib end -stop swith the upstands of the fixing clips (Figure 10.3.1).
Fitting KLIP-LOK rib end-stops after sheet installationBend the flat of the end-stops 90° . Push an end-stop into the
space under each rib until the flat is wedged firmly between the
underside of the clad ding a nd suppo rt (Fig ure 10.3.2).
Infill stripsClosed -cell, foa m-plastic infill strips a re ava ilab le t o mat ch the
top or bo ttom profile o f our roof cladd ings.
At the lower end of cladding, the strip is sandwiched under the
roof cladd ing . Similarly, a t the upper e nd, t he strip is sand wiched
bet wee n topside of t he roofing and the underside of the flashing
or ca pping (Fig ure 10.3.3).
Don’t use infill strips that can ab sorb wa ter beca use reta ined
moisture ca n lead to det erioration of the sheet coa ting. Avoid
using infill strips ma de from, or trea ted with, flamma ble
mat erials, pa rticularly in a reas p rone t o bushfire (Section 11.8).
Where roof pitches are be low 1 in 5 (10° ), you should incorporate
infill strips to maximise waterproofness.
Approx.5 mm
Cut back corner
Approx.5 mm
E n d s
t o p s
f a s t e n
e d t o
b a t t e n
2
1
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 54/70
Figure 10.4.1Fixing at end laps
10.4 End-lappingBecause our roofing and walling is manufactured by continuous
processes, sheet lengths can be supplied up to the limits of
transport regulations which are frequently long enough to cover
roofs without end-lapping the sheets.
If you contemplate using sheets that are shorter than the full
span, and o verlap them, you need t o co nsider:
• the roof s lope, because it a f fects the amount of overlap
(se e Ta b le 10.4. 1);
• the method of fixing of the cladding to its supports ,
beca use it a ffects the maximum leng th of sheet
(see Se ct ion 10.5 (Expa nsion joints) a nd Tab le 10.5.2).
Table 10.4.1End-laps
Fixing methods for end lapsThere are three me thod s of fixing clad ding a t end laps.
• Pierce-fixed through crests:
Position the lap centrally over the support; and the fastening
secures bo th the lap and the cladding. Space the fasteners as for
an e nd spa n (layout in Fig ure 10.4.1.a, t erminolog y and spacing
in Tab le 2.3.1). The t hermal expa nsion is a wa y from the faste ner
and t owa rds the outer ends of the sheet run.
• Pierce-fixed through valleys:
Position the lap centrally on the support, and the fastening
secures b ot h the lap and the clad ding (Figure 10.4.1.b). The
thermal expansion is away from the faste ner and to wa rds the
outer ends o f the sheet run.
• Concealed-fixed sheets:
You ca n eithe r pierce-fix throug h the crests o r the va lleys (Figures
10.4.1.a a nd 10.4.1.b), or use clips nea r the lap (Figure 10.4.1.c).
KLIP-LOK 406 sheets deform at the clips so that sheets wo n’t nest
to g ethe r. If you use clips, the lap is placed just clea r of and onthe high side o f the c lip (Fig ure 10.4.1.c). The lap is secured with
pierce-fixing throug h the valleys. The clips a llow the shee ts to slip
when they expand with heat.
48 INSTALLATIO N—ENDS OF SHEETS
(a)
Pierce-fixed
through crest
Fastened clipon purlin
2 fasteners per trayself-drilling screws
with EPDM
sealing washer
(b)
Pierce-fixed
through valley
2 fasteners per trayself-drilling screws
with EPDM sealing washer
(c)
Concealed-fixed
with
pierce-fixing
through valley
See text forspacing of fasteners
Se e T able 10 .4.1
S e e T abl e 10 .4.1
Se e T able 10 .4.1
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 55/70
1 0 E n d s o f s h e e t s
INSTALLATIO N—ENDS OF SHEETS 49
Figure 10.4.4 Sealing end-laps on very low pitched roofs
Figure 10.4.3 Laying sequence for end-lapped sheets
Figure 10.4.2 Remove down-turn of male ribwhen end-lapping KLIP-LOK 406
To ma ke the e nd-la pp ing o f KLIP-LOK 406 ea sier: remove, for the
length of the lap, the down-turn of the underlapping ribs of the
to p a nd b ot to m shee ts in each sheet run (Fig ure 10.4.2). The cut-
back ribs are covered by the sheets of the next sheet run.
LONG LINE 305 , can be fixed using a ny of the three met hods.
The underlapping ribs have t o b e slig htly sq uashed at the lap to
allow them to nest. An end-lap tool is available.
KLIP-LOK 700HS should not b e e nd lapped . Instead , an expansion
joint must be used. (Refer to Section 10.5 below) Ideally, long
length sheets from a mobile rollformer should be used where
po ssible a s this elimat es the need for joining .
Order of layingFor profiles o ther t han LONG LINE 305, lay e ach run of shee ts in turn
from bo tto m to to p be fore moving o n to the next run. For
LONG LINE 305, lay a ll low er run of shee ts first, the n lay the upp er
sheets (Figure 10.4.3).
Spacing of supports at end-lapsFor the maximum spacing between purlins, either side of an end
lap in a roof, use the spacing given for end spans (terminology
and spa cing in Tab le 2.3.1).
End laps in pitches less than 15 degreesEnd lap s in roofs of less tha n 1 in 4 (15° ) slope should b e se aled
with a sealant.
Use two runs of sealant (Figure 10.4.4):
• one run of sealant a t the low end of the lap (to prevent
moisture b eing d rawn in by ca pillary a ction);
• the other run at the high end (to prevent condensat ion
from running do wn the underside of the t op sheet a nd
ente ring the lap ).
When the sheet s are lappe d to g ether and fixed, the compressed
sealant should just appe ar at the end of the lap.
1. With the top sheet upside down, extrude a 3 mm bead
of sealant across the underside o f this sheet a bout 25 mmfrom the e nd.
2. Posit ion the bottom sheet , then extrude a 3 mm bead of
sealant across the to p of the sheet to encapsulate the cut end
of the underlapping sheet.
3. Turn the to p sheet o ver and fit it in place.
The side -lap be tw ee n sheets of roofing ha s a cavity to prevent
cap illary a ction be twe en a djacent sheet runs (Section 8.2).
It is important that excess sealant extruded from an end-lap
do es not enter this cavity be cause, if it d oes, mo isture t hat may
have entered the side lap will not be ab le t o d rain unimpede d
down the roof slope.
*
*
*
* Downturn of male rib removedfor length of lap
1
2
3
4
1 3
*
*
2 4
1
2
3 5
4
1 2 3
54
Profiles other than LONGLINE 305
LONGLINE 305
1
Apply 3 mm bead of sealant tounderside of overlapping sheet,
25 mm from end of sheet
2
Apply 3 mm bead of sealant
to encapsulate the cut endof the underlapping sheet
3
Turn sheetover
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 56/70
Table 10 .5.2 Maximum distancebetween top & bottom rows of fasteners on a sheet,before expansion joint is needed
Table 10 .5.1Thermal expansion and contraction of steel cladding
10.5 Expansion
Background on thermal expansionAll metals expand and contract with changes in temperature.
Although steel is by far the least affected of all the metals
commonly used for roof a nd w all clad ding, the change s in leng th
experienced in very long runs of roo fing are significant.
On a clear hot summer day, with no wind, the steel temperature
in roof cladding can reach approximately 50°C in COLORBOND®
Off-White, 60° C in p lain ZINCALUME® and mo re than 80°C in
COLORBOND® Ebony.
Examples of the thermal changes in lengths of steel cladding that
would result from various temperature changes in the steel are
sho wn in Ta b le 10.5.1.
The a ctual expansion or contraction betw een the end o f a sheet
and the last support would only be a fraction of the figures
shown be cause the movement in the length o f fixed cladding
would normally take place from the centre towa rds each end of
the shee t. The moveme nt at ea ch end is thus only half the tot al
expansion or contraction.
Transverse thermal e xpansion po ses no problems in ribb ed
clad ding beca use each rib a bsorbs some t ransverse movement.
Expansion joints
Thermal expansion e ffects a re mitigate d by slig ht b ending offastener shanks, thermal movement of the building structure,
and slig ht flexing o f the purlins (where they a re not restrained
by cleats o r bridg ing ). Howe ver, for very long runs of roo fing ,
you should include an expa nsion joint t o overcome linea r
thermal expansion.
Tab le 10.5.2 show s the ma ximum dista nce be tw ee n the to p and
bo ttom rows of fasteners on a sheet. If the tota l leng th of two
sheets pierce-fixed through the lap, or a single sheet exceeds
this distance , then a n expa nsion joint is neede d. There should b e
no more than one pierce-fixed end-lap between expansion joints.
An expa nsion joint involves overlap ping t he e nds o f the upp er
sheets over the e nds of t he lower sheets—but with a clearance
bet wee n them (ab out 15 mm). A typical overlap is 250 mm
(this o verlap is not the same a s the overhang in Tab le 2.3.1
which doe s not ap ply to e xpansion joints). The cleara nce is
usually create d b y having all the p urlins for the roo fing on t he
high side of the joint, higher than the roofing on the low side
of t he joint. An extra purlin is neede d at the joint. A ba ffle
flashing p rovide s we at herproofing . See Fig ure 10.5.1.
Where the re is a risk of high winds, or t he ribs are b ig , you ma y
need extra flashing, including closed-cell foam plastic infill strips.
50 INSTALLATIO N—ENDS OF SHEETS
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 57/70
1 0 E n d s o f s h e e t s
INSTALLATIO N—ENDS OF SHEETS 51
Figure 10.6.1Methods of stiffening roof overhangs
Figure 10.5.1
Expansion joint detail
Flashings provide the essential weatherproofing at theedges, and they sharpen the image of the finished job.
10.6 Roof overhang with edge stiffener For the stiffened overhang s listed in Tab le 2.3.1, you nee d to
stiffen the g utter ends of the roo fing.
Our SHEERLINE gutter, fixed through the return lip to the underside
of roo fing a t 200 mm centres will provide t he req uired stiffening .
Alternatively, you can use a 50 x 50 x 1.2 mm steel angle f ixed at
200 mm centres to the underside of the roofing ab out 50 mm
from the e nd.
250 mm
minimum o verlap
Baffle flashing.
Notch overribs & fasten tounderlappingsheet
25 mm min.clearance
300 mm
Trays turned up
Depth of
sheetingplus
15 mm
Foam infillcommonly usedwith INTEGRITY
Sheetingturned down
Steel angle 50 x 50 x 1.2 mmfixed to underside of roofing(200 mm centres).Gutter may be fixed to angle.
Sheerline gutter fixed to underside of roofing(200 mm centres)
O verhang
O v e r h a n
g
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 58/70
Figure 11.2.1Typical longitudinal flashings
Flashings and cappings are strips of metal formed to
wea therproof the edg es of roofing a nd wa lling. For the purposes
of t his cha pt er, only the te rm fla shing is used . The fo llow ing
sections should be considered as a guide only. For a
comp rehensive acco unt of flashing g uide lines, refer to HB39-
1997.
Similar methods of flashing are used for different cladding-
profiles. You ca n a da pt the principles to suit yo ur app licat ion.
In all cases it is important to have ample cover provided by the
flashing and proper turn-up of the cladding underneath.
Be careful when moving bet wee n supports. Do not wa lk in the
pan immediately adjacent to flashings or translucent sheeting.
Walk at least one pan away.
BlueScope Lysaght has a range of standard flashings. We can alsosupply custom flashings to your req uirements – ask your loca l
service ce ntre for d eta ils.
11.1 MaterialsIt is very important that flashings be made from materials that are
comp at ible w ith t he clad ding (Section 2.10).
Lea d flashing is not recommend ed , how ever it will usually be
retained when re-roofing, because it is usually cemented into the
structure. In these case s:
• the top surface of the lead f lashing must be painted with agood quality exterior paint system (to limit contamination
with lea d co mpo unds in wat er running o ff the flashing );
and
• there must be a ba rrier between the lead f lashing and the
clad ding: either a plastic strip (such as po lythene
dampcourse), or paint.
Fla shings sho uld co nform t o AS/NZS 2179.1:1994, a nd be
comp at ible w ith t he clad ding (Section 2.10).
Mate rials for flashing s a re a vailab le in ZINCALUME® or COLORBOND
®
finishes.
11.2 Longitudinal flashingsLongitudinal flashings run parallel to the pans or valleys, and are
ma de to suit the clad ding profile (Fig ure 11.2.1). They sho uld
have an e dg e turned-do wn to dip into t he pa n or valley.
Flashing Cover
The minimum recomme nde d cover o f longitudinal flashings o ver
cladding (as taken from HB39-1997) should be as follows:
11
Flashings
52 INSTALLATIO N—FLASHING S
Pierce fixed roof sheet 150mm min.
Concea led fixed roo f sheet Into full pan
(2/3 pa n co vered )
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 59/70
1 1 F l a s h i n g s
INSTALLATIO N—FLASHING S 53
Figure 11.3.1Typical transverse flashings
Fixing of Flashings
Long itudinal flashings shall be fa stene d at maximum 500mm
centres.
11.3 Transverse flashings
Transverse flashing s run across the p a ns or valleys (Fig ure 11.3.1).
They usually have a stiffening lip, a long the low er ed g e, w hich is
turned-dow n to dip into the p an o r valley. To ma ximise w ea ther
proofing, the bent lip is fashioned to fit the profile.
The t urn-do wn fo r transverse flashings fo r CUSTOM ORB and
CUSTOM BLUE ORB can be fashioned to fit the profile by either
notching or scribing to match the corrugations, or lightly dressed
into the valleys. The t ype of fashioning (if a ny) de pend s upon
profile shape and the type of material used to flash. Fashioning is
preferred for low-slop e roo fs.
The t urn-do wn fo r transverse flashing s for wide pa nned clad ding
is always notched or scribed to fit over the ribs.
Flashing Cover
Lysaght p rod uces a range of standa rd flashings (hip, ba rg e,
ap ron). To increa se w ea thertight ness, BlueScope Lysag ht
recommends you maximise the overlap between flashings and
claddings.
Fixing of Flashings
Transverse flashings sha ll be faste ned in accorda nce w ith HB39-
1997, as detailed below.
Notching toolsHand-ope rated notching t oo ls cut one notch at a t ime. Each tool
mat ches only one clad ding profile. There are tw o typ es of to ol;
their use depe nds on whether or not the edg e o f the flashing ha s
first been bent down (Figure 11.3.2).
Table 11 .3.1Notching tools
Every 4th rib
Every 3rd rib
Every rib
Profile Recommended Fixing SpacingCustom Orb/Custom Blue O rb Every 4th rib
Integ rity 820 Every rib
Klip-lik 406 Every rib
Klip -lo k 700 Hig h S tre ng th Eve ry rib
Long line 305 Every rib
Spa ndek Every 3rd rib
Trimdek Every rib
The a bo ve fastener spacing relates to the stitching o f flashings t o sheet ing.
It d oes not constitute the minimum number of faste ners req uired to fix the
sheeting to purlins.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 60/70
Figure 11.3.2 Using notching tools
Using notching toolsAfter the clad ding is fixed a nd t he turn-ups finished, p roceed
as follows.
• Place a f lashing with the notch-edg e resting on the ribs.
• Locate your notching tool over a rib with the notching head
ag ainst the flashing.
VERTICAL TOOL: The bod y locat es along the rib.
HORIZONTAL TOO L: the lugs on the underside locates on top
of the rib.
• Ra ise the hand le to open the too l and :
VERTICAL TOOL: lift the flashing into the mo uth of the too l;
HORIZONTAL TOO L: slide the mouth of the tool over the edg e
of the flashing as far as it will go.
• Push down on the handle to perform the notching.
• Repeat for all ribs, checking in each case that the f lashing is
correctly positioned .
• If you are using a horizontal tool, bend down the tongues
bet wee n the notches over a suitab le straig ht edg e (such as a
piece o f timbe r).
Notching with tinsnipsIf notching tools are not available, flashings can be notched to
the rib profile w ith tinsnips (Fig ure 11.3.3). The p roced ure is
sometimes known as scribing. After the cladding is fixed and the
turn-ups finished, procee d as follow s.
• P lace the f lashing with the turned-down edg e rest ing
on the ribs.
• Mark out the notching using a template positioned over
each rib.
• Cut the notches with t insnips .
This proce dure is also used fo r hip ca pp ings.
Fasteners for transverse flashingsYou must prop erly fix bo th flashing s and the e nds o f all sheet s.
Where the clad ding is pierce-fixed through crests, a nd t he
po sition of t he purlin allow s it, t he fa stene rs used to fix the
sheet s, should also fix the flashing s.
On all other installations, pierce-fix your flashing to the ribs orcrests of t he sheets.
54 INSTALLATIO N—FLASHING S
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 61/70
1 1 F l a s h i n g s
INSTALLATIO N—FLASHING S 55
Figure 11.3.3 Using a template to mark out for notching with tinsnips
Tab le 3.8.1 show s the fa stene rs and t heir locations for the end s of
sheets (Figure 11.3.1).
Joining flashingsThe o verlap s of t ransverse flashing s should be sea led with a
recommended sealant and fastened. Before finally positioning
and fixing the lap, turn over the top p iece and a pply a 3 mm
bea d o f sealant across the flashing, a bo ut 12 mm from the e nd.
Figure 11.4.1
Typical flashing at changes of pitch
11.4 Flashing at change of pitch
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 62/70
Figure 11.5.1Flashing method 1: Head gutter
Figure 11.5.2 Flashing method 2: Flat tray and sleeve
11.5 Flashing large roof penetrationsPenetrations through ribbed cladding block the valleys
(or pans), and thus affect the free flow of rainwater down a roof.All flashings have to weatherproof the cladding – but on the
uphill side of large penetrations, they also have to channel
rainwater sideways into valleys that run unobstructed
to the eaves.
Four methods are described here. In all methods the ends of cut
ribs may be closed off with caps on the outside of the rib, or with
plugs inside the ribs. Plugs must be used on side-laps to allow
the anti-capillary cavity to drain.
Note: For masonry construction, Building Code Australia
(BCA) requires the use of Damp Proof Course (DPC) to ensureweatherproofing. For acceptable methods see BCA section on
weatherproofing masonry.
Support framingWherever one or more of the sheet ribs are cut, you must
provide framing to support the cut ends of the roof cladding
each side of the penetration.
Existing flashingIf you have to re-use lead flashings that are built into the
structure, special protection is needed (Section 11.1).
Method 1: Head gutter and apron flashingsThis is often the simplest method, and commonly used for
existing protrusions (Figure 11.5.1).
Method 2: Flat tray and sleeveTo avoid fitting and sealing end caps to all the sheet ribs on the
low side of the penetration, an apron flashing can be fitted to the
sleeve and sealed to the tray each side.
56 INSTALLATION—FLASHINGS
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 63/70
1 1 F l a s h i n g s
INSTALLATIO N—FLASHING S 57
Figure 11.5.3 Flashing method 3:
Tray gutter for steeper roofs
Figure 11.5.4 Penetrations close to ridge capping
Method 3: Tray gutter for steeper roofsIf the roo f pitch is mo re tha n, say 1 in 12 (5° ), you cut t he roo f
cladding sufficiently high above the penetration to allow a tray
g utter to raise rainwater over the to p o f the sheet ribs a nd d ivert
it around the penetration (Figure 11.5.3).
Method 4: Penetration close to ridge cappingIf a roof penetration is close to a ridge capping (or flashing
above the penetration), you can fit a simple flat tray, on top of
the roofing, so t hat it extends from under the capp ing d own to a
slee ve a round the pene trat ion. A similar installat ion is show n in
Fig ure 11.6.3).
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 64/70
Figure 11.6.2 Small penetration with sleeve
Figure 11.6.1Small penetration
with metal skirt and sleeve
11.6 Flashing small roof penetrationsA flang ed cylindrical slee ve is a fa irly simple met hod of flashing
around small penetrat ions (such as pipe p enet rations) which fit
bet wee n the ribs of a roo f sheet, or penet rate o nly a sing le rib.
Three metho ds a re de scribe d here. Wherever roo fing is cut,
you must consider providing extra support for the roofing above
and below the penetration.
Method 1: Tapered metal skirt and sleeveThis met hod uses pa rts custom -fab rica te d from met al. There is no
positive seal between inside the building and the outside
a tmo sphe re (Fig ure 11.6.1).
Method 2: sleeveThis is oft en t he simplest me tho d (Fig ure 11.6.2). Flexible flang ed
sleeves can b e b ought for flashing around penetrations of at least
350 mm diameter. They overcome the prob lem o f capping and
sea ling the o pen end s of cut ribs. is commo nly used, thoug h
silicone sealant has a wider operating tempe rature range a nd is
available in a wider range of colours.
The flang e around the base o f the sleeve can be conto ured by
hand t o match the clad ding profile b efore it is sealed a nd fixed
to the cladding.
Be ca reful not to da m any valleys or pans so tha t rainwa ter can
drain freely from the high side of the roof penetration. Moisture
held in such areas ca n cause d ete rioration of the sheet coa ting,
reduced life expecta ncy or poor app ea rance.
Where damming of any valley or tray is unavoidable, due to
the size of the pipe penetration, treat the installation as a large
penetration (Section 11.5).
Copper penetrationsAll copper pipe penetrations through ZINCALUME
® or COLORBOND®
clad ding must b e p hysically and electrically isolate d from t he
clad ding. This can b e d one by using a sleeve o f , PVC po lythene ,
or similar plastic that is also ultra-violet stable.
58 INSTALLATIO N—FLASHING S
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 65/70
1 1 F l a s h i n g s
INSTALLATIO N—FLASHING S 59
Figure 11.7.1Typical header and sill flashing: profile running horizontally (elevation)
11.7 Flashing wallsCladding is usually installed with the profile running vertically or
horizontally, though sheets have been laid diagonally—the choice
is aesthetic.
Wind can drive rain hard a g ainst wa ll flashings, so it is important
that you pay a ttention to the d eta iling of flashings a round
windows, doors, re-entrant and external corners, to ensure you
g et a wat ertig ht building . You also wa nt a nea t ap pea rance.
We make wall flashings for some wall claddings (like EASYCLAD
and MINI ORB) which are some times called trims. Where these are
not suitable, custom-made flashings can be easily produced
follow ing the g eneral principles de scribe d in this section.
Walling profile running horizontally• It is usual to lay the f irst sheet at t he bottom of a wa ll and
work upwa rds to wa rds the eaves. You wa nt the w indow and
do or flashing s to fit p roperly into the valleys, so you should
locate the first sheet relative to the heads and sills of doors
and windo ws. Thus, you first have t o d ecide where the
clad ding will eventually be locate d a t the hea ds of d oorwa ys
and a t the hea ds and sills of windo ws be fore you place the
first sheet .
• Where possible, select the vertical size of windows so that theflashings a t b ot h hea ds a nd sills will coincide nea tly with the
pitch of your profile (Figure 11.7.1).
• Be sure that the crests of the profile align with each other on
ad jace nt wa lls, either side of a corner—this ensures that
horizontal fashings fit properly into all valleys.
• Where valleys create a void a t f lashings, use closed-cell foam
pla st ic infill (Figure 10.3.3).
• Where wind-driven rain can be expected, turn back the edg es
of flashing to restrict water movement past the flashing.
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 66/70
Figure 11.7.3 Typical flashing at window and door jambs: profile running horizontally
Figure 11.7.2 Typical corner flashings: profile running horizontally (plan view)
60 INSTALLATIO N—FLASHING S
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 67/70
1 1 F l a s h i n g s
INSTALLATIO N—FLASHING S 61
Figure 11.8.1Typical protection from sparks at ridge
11.8 Bushfire protectionAS 3959—1999 sets out req uirements for the d esign a nd
construction of buildings in bushfire-prone areas. It calls for
flashings to be bed ded on fire resistant insulation ma terial.
Be sure tha t flashing s fit close ly. Transverse fla shings sho uld b e
notched or scribed (Figures 11.3.1 and 11.8.1)
Walling profile running verticallyFlashings a re g enerally ea sier on job s whe re the profile runs
vertically (Figures 11.7.4 and 11.7.5).
Figure 11.7.5 Typical corner flashings: profile running vertically (plan). J amb flashings follow same principle.
Figure 11.7.4 Typical header and sill flashing: profile running vertically (elevation)
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 68/70
BlueScope LysaghtAmongst the publications of BlueScope Lysaght,
the following are particularly appropriate.
Technical bulletins (General)
TB-1 Steel roofing and walling products: Selection
guide
TB-2 Overpainting and restoration of COLORBOND
®
prepainted steel sheet
TB-4 Maintenance of COLORBOND® prepainted steel
roofing
TB-5 Swarf staining of steel roofing and walling profiles
TB-8 Flashing materials for ZINCALUME® & COLORBOND
®
steel sheet
TB-13 General guide to good practice in the use of
steel roofing and walling products
TB-15 Recommended steel gutter systems
TB-16 Fasteners for roofing and walling product:
Selection guide
TB-17 Selection guide for galvanised steel purlin
products
Technical bulletins (Corrosion)
CTB-1 General introduction
CTB-8 Building applications
CTB-10 Roof penetrations
CTB-11 Condensation
CTB-12 Dissimilar metals
CTB-13 Contact with timber
CTB-15 Acid cleaning brickwork
CTB-16 Immersion
CTB-17 Following trades
CTB-18 Painting lead flashing
References
Australian standardsAS 1170.1 SAA Loading Code: Dead and live loads and
load combinations
AS 1170.2—1989 SAA Loading Code: Wind loads
AS 1170.3—1989 SAA Loading Code: Snow loads (and
the Supplement)
AS 1170.4—1989 SAA Loading Code: Earthquake loads
(and the Supplement)
AS 1397—2001 Steel sheet and strip—Hot-dipped zinc-
coated or aluminium/zinc-coated
AS 1562.1—1992 Design and installation of sheet roof
and wall cladding: Metal
AS/NZS 2179.1:1994 Specification for rainwater goods,
accessories and fasteners: Metal shape or sheet
rainwater goods, and metal accessories and
fasteners
AS 2334—1980 Steel nails—Metric series
AS 2627.1—1993 Thermal insulation of dwellings
AS/NZS 2728: 1997 Prefinished/prepainted sheet metal
products for interior/exterior building applications—
Performance requirements
AS 3500.3—1990 National plumbing and drainage
code—Part 3: Stormwater drainage
AS 3566—1988 Screws—Self-drilling—For the building
and construction industries
AS 3959—1999 Construction of buildings in bushfire-
prone areas
AS 4040.1—1992 Methods of testing sheet roof andwall cladding—Resistance to concentrated loads
AS 4040.2—1992 Resistance to wind pressures for non-
cyclone regions
AS 4055—1992 Wind loads for housing
AS/NZS 4256—1994 Glass fibre reinforced polyester
SAA HB39—1997 Installation code for metal roof and
wall cladding
SAA HB106—1998 Guidelines for the design of
structures in snow areas.
62 INSTALLATIO N—FLASHING S
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 69/70
R e f e r e n c e s &
I n d e x
INDEX 63
at small penetrations 58
sleeve 58
longitudinal 52
materials 52
notching 55
notching too ls 53
not ching with tinsnips 54
transverse 53
walls 59
Ggutters
areas 26
typical types 25
Hhand ling prod ucts 27
hea t control 20
holes 27
Iincompatibility. See compa tibility of
materialsinfill st rips 47
information 1
installation
alig nment of roofing 32
concealed-fixing 35
Easyc lad Hi-Ten 40
Kilp-Lok on w a lls 39
Klip-Lok 35
Longline 305 42
pierce-fixed 31
crest fixing 33
Mini Orb 34
procedure 31
side-laps 33, 34va lley fixing 34
insulation
faste ner length 11
heat 20
materials 22
noise 22
thickness limita tions 23
Llengths
roofing 3
roofing drainag e 8
transportation 4lifting roofing 31
Eeffective roof leng ths for drainag e 8
end-lapping 48
expansion 50
fixing method s 48
low pitches 49
orde r of laying sheets 49
spacing of supports 49
ends of sheets 44
bloc king rib cavities 47
end-lapping 48overhang , stiffened 51
turn do wns 46
turn ups 44
environmenta l cond itions 4
expansion 50
expa nsion joints 50
Ffasteners 9
features tab le 10
for acce ssories 11
for Custom Blue Orb 12
for Custom Orb 12for Easyclad 12
for insulation 11
for Integ rity 820 13
fo r Klip-Lok 13
for Long line 13
for Mini Orb 13
for Multiclad 14
for Multiline 900 14
for Pa nelrib 14
for side-lap s 11
for Spa nd ek Hi-te n 15
for thicker ste els 11
for transve rse flashings 54
fo r Trimdek Hi-te n 15fo r Trimwall 15
fo r Wallclad 15
identification 10
materials 9
q uantity required 11
rivets, sea ling 29
screw s, sett ing tig htness 10
sea ling wa shers 9
wa shers, sea ling 9
finishes 2
flashings 52
at change o f roof pitch 55
at copper penetrations 58
at large penetrations 56
Aalig nment o f roo fing
Klip-Lok 700HS 38
pierced-fixed 32
Australian Standa rds 62
Bblocking rib ca vities 47
bullnose d (see pre-curved roo fs) 18
bushfire protect ion 61
Ccappings. See flashings
care of products 27
clea n up 28
clips
for Easyclad 40
fo r Klip-Lok 35
for Long line 305 42
req uired q uantities 11
coa tings, stripa ble 28
COLORBOND® 2
and painting 4avoiding rust stains 28
compa tibility of materials 4
drainag e tab le 5
concealed-fixing. See installation
condensation 21
crest fixing 33
curving. See roof: curved
cutting clad ding 27
cyclonic
anchoring foot ing s 3
conditions 1
DDektite flashings 58
design 2
roof drainag e 24
roofs 2
walls 2
dissimilar metals. See compatibility
of materials
do wnpipe size. See roof: d rainag e:
downpipe size
drainag e o f roofs. See roof: drainage :
design
Index
8/9/2019 Roof Walling Installation Entire Manual
http://slidepdf.com/reader/full/roof-walling-installation-entire-manual 70/70
64 INDEX
rust stains
avoiding 28
wa rn othe r contract ors 28
Ssafety 27
guardrails 27
lifting roofing 31
wa lking on roo fs 27
screws. See also fasteners
sett ing tightne ss 10
sea lant use 29
sealants 28
sea ling wa shers 9
selection of products 2
silicone sea lant . See sealants
skylighting 23solvents 30
spa cing definitions 6
Spa nde k overlap s 47
specifications
for profiles (ta bles) 6
materials 2
storag e of prod ucts 27
stripa ble coa tings 28
support spacings 3
Ttape red roofing 19
te chnical bullet ins 62testing performance 3
thermal transmission (see hea t
control) 20
translucent cladding. See skyligh ting
transportation 4
trims (see flashing s, wa lls) 59
turn do wns 46
turn-ups 44
Vva lley fixing 34
Wwa lking on roo fs 27
wa ll flashings 59
wa lls, de sig n 2
warranties 1
wa shers, sea ling 9
Mmaintenance 29
marking out 27
materials
clad ding specificat ions 2
for faste ners 9
for flashings 52
for insulat ion 22
Mini O rb 34
Nnails. See fasteners
noise reduction 22
notching. See flashings
Ppe ncils for marking out 27
performance tests 3
pierce -fixing . See installation
pitches of roo fs 3
products
profiles 6
selection 2
profiles of clad dings 6
Qq uantities of clips &fa stene rs 11
Rrainfall intensities ta ble 25
references 62
rivets. See fasteners
roof
alig nment of sheet s 32
curved 16
bullnosed (see pre-curved
roofs) 18
cappe d bent ribed 19
pre-curved 18
spring-arched 17
spring-curved 18
spring-curved-ridge 16design 2
drainage
design 24
do wnpipe locating 26
dow npipe size 25, 26
g utter areas &d ownpipes 26