2006 alberta building code - phbi · pdf file1 2006 building code – flashing changes...
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2006 Building Code –
Flashing Changes &
Challenges
Builder Breakfast and Luncheon Series
Presented by:
2
Speakers
Mick Ryan, President, Siding Contractors
Association of Alberta (SCAA)
Michael Andrade, Gienow Windows &
Doors/AHITC Subcommittee
2006 Building Code –
Flashing Changes &
Challenges
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Code Areas Affected by Flashing
Changes
9.3.3.2 & 9.27.3 Materials for flashing
9.26.4.1 Decks as Structures
9.27.3.8 Flashing Installation
These changes apply to all types of exterior
cladding materials (siding, stucco, masonry,
etc.)
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Allowable Materials for Flashing
9.27.3 & 9.3.3.2
Lead, galvanized steel, copper, zinc,
aluminum
No change in thicknesses or materials allowed
The Standards for flashing galvanizing have
changed
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Flashing at Decks 9.26.4.1
Decks & balconies that do not permit the free
drainage of water through the deck must be treated
as a roof.
Unless the surface slopes to the outside of the building
so water can freely drain over the edge.
Flashings should installed
between walls and decks
at guards in contact with the decks
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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
Horizontal joints in stucco with expansion
strips
Section 9.27.3.8 Flashing Can Be
Omitted Where…….
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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)
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 for Wall Openings
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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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Penetration Options
Flash each penetration individually
Mount all penetrations on battens to allow the flashing to
be placed on the battens rather than each penetration
individually.
Use self draining/flashed covers that meet code
requirements
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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.
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Flashing at the Window Sill
The 2006 ABC requires flashing at window
sills
2 acceptable solutions are recognized
Metal sill flashing
A self-flashing sill
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Flashing at the Window Sill
Acceptable Solution #2
6% Slope
Drip 5 mm
beyond cladding
Self-flashing sill
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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
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In Summary
Talk to your contractors to
Ensure that the flashing materials and
configurations used meet code requirements
Galvanization, “leg” length, 6% slope
Ensure deck interfaces are flashed
Review designs and add flashing transitions
Discuss with your contractors
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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)
Stucco Toolkit – CHBA AB or ANHWP
(www.chbaalberta.com)
AWCA Stucco Resource Guide (403-250-7045)
CMHC Flashing Guide (www.cmhc-schl.gc.ca)