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2006 Building Code –

Flashing Changes &

Challenges

Builder Breakfast and Luncheon Series

Presented by:

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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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Flashing Mechanical Penetrations

1997 Code

2006 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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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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Questions?

Thank you!

2006 Building Code –

Flashing Changes &

Challenges