2006 building code - siding contractors association of alberta of flashing details.pdf · 2...
TRANSCRIPT
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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