Transcript 2006 Alberta Building Code - Canadian Home Builders

2006 Building Code –
Flashing Changes &
Challenges
Builder Breakfast and Luncheon Series
Presented by:
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2006 Building Code –
Flashing Changes &
Challenges

Speakers

Mick Ryan, President, Siding Contractors
Association of Alberta (SCAA)

Michael Andrade, Gienow Windows &
Doors/AHITC Subcommittee
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Code Areas Affected by Flashing
Changes



9.3.3.2 & 9.27.3
9.26.4.1
9.27.3.8

Materials for flashing
Decks as Structures
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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Section 9.27.3.8 Flashing Can Be
Omitted Where…….

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
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Section 9.27.3.8 Flashing
Specifications for Wall Openings

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)
WRB
25mm
End Dam
50mm
Upwards
6% slope
10mm lap over
building
element below
5mm
offset
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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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Flashing Mechanical Penetrations
2006 Code
1997 Code
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Penetrations

All penetrations must be flashed, top and
bottom
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3”
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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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17
Flashing at bottom of Batten
25mm
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Batten & Flashing Detail Above
Window
25mm
25mm Up Dam
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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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Options for Flashing at Window Sills

Acceptable Solution #1
Metal Sill Flashing
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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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Drip Accessory – Potential
Acceptable Solution
Vinyl
Window
Metal Clad
Window
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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)
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2006 Building Code –
Flashing Changes &
Challenges
 Questions?
 Thank
you!
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