Wood Knowledge Waleswoodknowledge.wales/wp-content/uploads/2018/11/Kevin-Underwoo… · BS EN ISO...
Transcript of Wood Knowledge Waleswoodknowledge.wales/wp-content/uploads/2018/11/Kevin-Underwoo… · BS EN ISO...
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Wood Knowledge Wales Developing the Welsh Joinery Sector.
Barriers and opportunities for windows
The WWA Standard for manufacturing wood windows and window performance
Kevin Underwood
Wood Window Alliance
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Introduction
Requirements for WWA timber windows
Other factors affecting high performance windows
Considerations for extending service life and reducing maintenance costs.
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Timber Window Accreditation Scheme
The Wood Window Alliance technical specification for windows has developed from the requirements of the TWAS.
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Whole life analysis of timber windows
Whole Life Analysis of timber, modified timber and aluminium-clad timber windows: Service Life Planning (SLP), Whole Life Costing (WLC) and Life Cycle Assessment (LCA)
Dr Gillian F. Menzies Institute for Building and Urban Design Heriot Watt University June 2013
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BS EN 14351-1:2006+A2:2016
Windows and Doors
Product Standard
Performance characteristics
Part 1 Windows and External Pedestrian Doorsets
Product Testing, European Standard
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Declaration of Performance and CE Label
Any declaration for a performance characteristic that is an “essential characteristic” from Annex ZA of the product standard must be made first on the DoP.
http://www.bwf.org.uk/publications/ce-marking
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BS 644
Timber Windows and Doorsets
Fully Finished factory-assembled windows and doorsets of various types
Specification
Product Testing, British Standard
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Product Testing Clause Heading Sub-clause Heading Part Clause Additional information Other
referenced
standards
10 Security 10.1 Basic
Security
3 5.13.1 BS 6375-
3:2009
Annex A
10.2 Enhanced
Security
3 5.13.2 PAS 24
11 Safety in case of
fire
11.1 Fire
resistance
3 5.2.3 Test and
classification
BS EN 14600
11.2 Reaction to
fire
3 5.2.1 material of roof
windows only
Test and
classification
BS EN
13501-1
Performance
levels
Approved
Document B
12 Safety in use 12.1 Impact
resistance
(see below)
2 5.4 Test BS EN 13049
Classification BS 6375-2
12.2 Safety
Devices (see
below)
2 5.3 Load bearing
capacity
Test BS EN 14609
Performance
level
BS EN 14351
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Product Testing 13 Weathertightness 1 6 Air
permeability
Test BS EN 1026
Classification BS EN 12207
7 Weathertightn
ess
Test BS EN 1027
Classification BS EN 12208
8 Resistance to
wind
Test BS EN 12211
Classification BES N 12210
14 Operation and
strength
characteristics
2 5.1 Operating
forces
Test BS EN 12046-1
Classification BS EN 13115
5.2.1 Resistance to
static torsion
Test BS EN 14609
Classification BS EN 13115
5.2.2 Racking Test BS EN 14608
Classification BS EN 13115
5.3 Load-bearing
capacity of
safety devices
Test BS EN 14609
Classification 350 N threshold
5.4 Impact
resistance
Test BS EN 13049
Classification Table 2
BS 6375-2
5.5 Resistance to
repeated
opening and
closing
Test BS EN 1191
Performance Min. 10000
cycles
As specified in
BS EN 12400
Class 2
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Product Testing
15 Hygiene, health
and the
environment
Ventilation
device
N/
A
Test BS EN 13141-1
Classification BS EN 13142
16 Acoustic
Performance
3 5.5 Tested BS EN ISO 140-3
Evaluated BS EN 717-1
17 Energy
conservation
Thermal
Transmitta
nce
3 5.6 Calculation
method
General BS EN ISO
10077-1
Numerical
method
BS EN ISO
10077-2
Hot box method Windows and
doors
BS EN ISO
12567-1
Roof windows BS EN ISO
12567-2
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BS EN ISO 9001:2015 – QMS
Factory Production Control
CE Marking – constancy of performance
Continuous Improvement
Quality Management Systems
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Prescriptive Tolerances in Standards
Process Variation
Effects on performance
Tolerances
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BS 8213-1
Windows, doors and rooflights
Part1 Design for safety in use and during cleaning of windows, including door-height windows and roof windows
Code of practice
Safety
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BS 8213-4:2016
Windows and doors.
Code of practice for the survey and installation of windows and external doorsets
Installation
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Regulation (EU) 995/2010
laying down the obligations of operators who place timber and timber products on the market
http://ec.europa.eu/environment/forests/timber_regulation.htm
European Timber Regulations
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Chain of Custody
Forest Stewardship Council
Programme for the Endorsement of Forest Certification
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Regulation (EU) 528/2012
concerning the making available on the market and use of biocidal products
http://www.hse.gov.uk/biocides/basics.htm
European Biocidal Products Regulation
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Regulation (EC) No 1907/2006
concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), establishing a European Chemicals Agency
http://ec.europa.eu/environment/chemicals/reach/reach_en.htm
http://www.hse.gov.uk/reach/index.htm
REACH
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Smoke Toxicity
The study aims at evaluating the need to regulate on toxicity of smoke generated by construction products in fire within the framework of Regulation (EU) No 305/2011 and the possible impacts of any such measures.
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Emissions of VOCs
COMMISSION DELEGATED REGULATION on the classification of performance of construction products in relation to their emissions of volatile organic compounds into indoor air
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What is an EPD?
An Environmental Product Declaration (EPD) communicates verifiable, accurate, non-misleading environmental information for products and their applications, thereby supporting scientifically based, fair choices and stimulating the potential for market driven continuous environmental improvement.
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Environmental Product Declarations (EPD)
http://www.bwf.org.uk/toolkit/environmental-waste-management/what-is-a-life-cycle-assessment
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Materials Health
Cradle to Cradle Certified™ Banned List of Chemicals
Chemicals and substances that are banned for use in Cradle to Cradle Certified™ products as intentional inputs above 1000 ppm (0.1%) by weight.
These are materials which have a tendency to accumulate in the biosphere and lead to irreversible negative human health effects or have hazardous characteristics associated with their manufacture, use, or disposal.
http://www.c2ccertified.org/resources/detail/cradle-to-cradle-certified-banned-list-of-chemicals Question to suppliers Please confirm that the products you supply to us do not use any of the materials listed in their production.
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Materials Health Feasibility Study
A wooden window frame, can be eligible for certification on a Silver level.
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Biophilic Design
Interior design expert Oliver Heath (pictured right), and Ed Suttie, Research Director at BRE Centre for Sustainable Products (left).
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The term ‘biophilia’ refers to the adaption or design of a building to the environment, rather than the other way around. The meaning of the word biophilia is a love for nature and it is considered by some to be the missing part of sustainable design. Biophilic design aims to create strong connections between nature and manmade environments which can have benefits for health and wellbeing.
Biophilic Design
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The Circular Economy
A Circular economy has the potential to give rise to much more resilient economies with more abundant resources and a healthier environment
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BIM Building Information Modelling
Land Rover BAR Team HQ Portsmouth BIM Level 2
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SERVOWOOD Reasons for coating wood
Protection
Durability
Weather resistance
Appearance
Colour
Gloss and sheen
Texture
Enhanced performance
Fire resistance
Fungal and algal resistance
Coating to protect from substrate interactions:
Moisture movement
Interface problems e.g. adhesion
Chemicals in wood such as: tannin and resins
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SERVOWOOD Research Laboratories and Natural weathering Sites
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Accelerated Weathering
UV-A fluorescent testing (2,000 hours).
Natural Weathering
Traditional 45 degree exposure rig facing South.
New Multifaceted Exposure Ring (MFER)
Allows exposure at zero, 45 and 90 degrees and N, S, E and W orientation.
Includes artificial wetting and heating.
SERVOWOOD Weathering Tests
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SERVOWOOD Results – fungal growth
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Coating Service Life
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Orientation of grain for coated surface – flat sawn or quarter sawn
Angle of coated surface – vertical, 15 degrees to horizontal, less than 15 degrees to horizontal etc.
Radius of arris (sharp) edges – 0mm, 1.5 to 3mm, greater than 3mm etc.
Surface quality – machined finish or sanded finish
Denibbing or sanding? – is process too heavy
Leave primer and undercoat to “absorb” the nibs?
End-grain sealing – assessment of method used (materials and application)
Movement of timber
Flexibility of adhesive
Tannin/extractive staining Idigbo not so much sapele
What do people use? Redwood, sapele, grandis, iroko
Factors that can affect coating performance
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Location of component – top horizontal (head), bottom horizontal (sill), upper end of vertical component, lower end of vertical component etc.
Application of preservative – none, superficial treatment, impregnation treatment (3mm analytical zone)
Extension of component from face of window (or other product) i.e. sill projection – flush (0mm), 25mm 100mm etc.
Location of window in building opening – 100mm from external face, 50mm, 0mm etc.
Protection from weather – by soffit (lintel), canopy or porch etc.
Exposure to weather – External
Construction moisture - Internal Humidity
Factors that can affect coating performance
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BS EN 927-1:2013
Paints and varnishes – Coating materials and coating systems for exterior wood Part1: Classification and selection
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Exposure to wind driven rain
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Exposure to wind driven rain
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Exposure to wind driven rain
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EN 927-1 Direction of Exposure (Orientation)
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EN 927-1 Degree of Shelter
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EN 927-1 Inclination of weathered surfaces
Decreasing the angle of exposure from vertical towards horizontal greatly increases the intensity of weathering for sheltered as well as not sheltered parts.
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EN 927-1 Relative Exposure Conditions
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18 year exposure trial
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Enhanced Security – Building Regulations
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Enhanced Security -Secured By Design Clause 22.5 for windows Unless the developer has been awarded Secured by Design National Building Approval for the relevant dwelling types, the Crime Prevention Design Adviser (CPDA) shall be supplied with proof of certification, and its scope, by the developer, unless the supplier is a member of the Secured by Design Licensing Scheme and the window can be identified on the SBD website.
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SBD for small businesses - Certificate Holder
Certification for window “system” Initial Type Tests (ITT)
Weather performance
Mechanical performance
Enhanced Security
Establishes scope of certification – sizes and arrangement of opening and fixed lights.
Manages specification (scope, materials, suppliers etc.)
Liaises with Secured By Design
Window System is audited through the Fabricator Network
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SBD for small businesses - Fabricator
Fabricator signs up to manufacture to the Window System specification and scope – No Tweeking
assembles window in accordance with specification and training
audited annually for FPC
Sample of members audit tested annually – proves Window System
Multiple Window Systems leads to more frequent audit testing.
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Summary
Long service life and low maintenance costs
Selection of material
Attention to details in design
Controlled factory processes
Optimum installation
Inspection and Maintenance before failure
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Thank You
Any Questions