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2006 Building Code –

Flashing Changes

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Building Code Changes� The material in this presentation is a summary of

minimum building code requirements � per the 2006 Alberta Building Code which is an

extension of the National Building Code of Canada

� Developed by National Research Council of Canada

� 2006 Building Code changes will be incorporated into all new building permits� The only way a contractor should build anything less

than code requirements would be

� The Authority have jurisdiction authorizing the deviation from code

� A design professional (architect, engineer) stamp of approval is obtained on the blueprints

Be sure to get detailed flashing requirementsfrom your builder’s blueprints

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Section 9.27.3.8 Flashing Installation

� Flashing must be installed at� every horizontal change in cladding element

� every horizontal offset in the cladding

� every horizontal line where the cladding substrate

changes, and

� top and bottom of all penetrations

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� the upper cladding elements overlap the lower cladding elements by at least 25mm

� Where drained & vented air spaces are used

Section 9.27.3.8 Flashing Can Be

Omitted Where…….

25mm

overlap

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WRB

25mm

End Dam 50mm

Upwards

6% slope

10mm lap over

buildingelement below

5mm

offset

� Extend at least 50mm upward (1997) behind the weather resistant membrane.*

� Have a minimum 6% positive slope (2006)

� Have end-dams not less than 25mm high

� Lap a minimum of 10mm vertically over the building element below (2006)

� Terminate with a drip that extends at least 5mm out from the face of the building element (2006)

Section 9.27.3.8 Flashing

Specifications

*Note: in a siding application where the J-Trim is placed above the 25mm up dam,

the upward leg of the flashing must be 75mm high to meet code requirements

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Perimeter

Flashing

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Installation of

Perimeter

Flashing

Siding can be clipped over the

Perimeter Flashing

or

set on top of the flashing in a

J Trim

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6 % SLOPE6 % SLOPE6 % SLOPE6 % SLOPE

6 % SLOPE6 % SLOPE6 % SLOPE6 % SLOPE

Typical Wall

Cross-section

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6 % slope6 % slope6 % slope6 % slope

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� Weather Resistant Barrier to overlap 9” on vertical joints

� Weather Resistant Barrier to overlap 4” on horizontal shingle laps

� Caulk behind batten & J Trim on verticals

� Caulk behind reverse flashing on horizontals.

6 % slope6 % slope6 % slope6 % slope

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Batten & Flashing Detail Above

Window

25mm

25mm Up Dam

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Flashing of Curved or Round Windows

� A curved topped or round window must be

flashed but the flashing does not need to be

terminated with an end dam

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Metal Battens

� Must be flashed on the top and the bottom

unless the profile of the batten meets code

requirementsmin 50mm

behind cladding 6 % slope

element above

min 25mm over lap

of lower cladding

element

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Penetrations

� All Penetrations must be flashed top and

bottom

� Reverse flashings are not acceptable at the bottom of a

penetration

� Flashings must end in 25mm up dam

� Self draining/flashed covers can only be used if they

meet code requirements

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In Summary

� The 2006 flashing requirements

� have created additional complexity

� Number of locations requiring flashings has increased

� Configuration of the flashing

� Up dams

� “Leg” length may vary depending on application

� Will result in additional cost due to

� increased install time required

� increased amount of flashing materials

� Be sure to share you ideas and experiences with the Association members

� Improves the quality of our workmanship

� Minimizes issues for all members

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Additional Resources and

Information

� Questions on acceptable solutions

� Local Code Authority

� Municipal Affairs help line (866-421-6929)

� Flashing Details

� Siding Contractors Association of Alberta

(403-291-9707)

� CMHC Flashing Guide (www.cmhc-schl.gc.ca)

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� Questions?

� Thank you!

2006 Building Code –

Flashing Changes