2006 Building Code Flashing Changes

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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 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 Flashing9.27.3 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)

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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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• 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 SillAcceptable 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!