9.26.7. Asphalt Shingles on Slopes of 1 in 3 or Greater

9.26.7. Asphalt Shingles on Slopes of 1 in 3 or Greater
9.26.7.1. Coverage
  1. Coverage shall be not less than 2 thicknesses of shingle over the entire roof, disregarding cutouts.
9.26.7.2. Starter Strip
  1. A starter strip shall be installed along the lower edge of the roof so that it extends approximately 12 mm beyond the eaves and rake of the roof and fastened along the bottom edge with nails spaced not more than 300 mm o.c.
  2. Starter strips shall be
    1. at least Type M mineral-surfaced roll roofing not less than 300 mm wide,
    2. shingles of the same weight and quality as those used as a roof covering with tabs facing up the roof slope, or
    3. pre-manufactured starter strips installed with sealant at the eaves.
  3. Starter strips need not be provided where eave protection of not less than Type M mineral-surfaced roll roofing is provided.
9.26.7.3. Head Lap
  1. Shingles shall have a head lap of not less than 50 mm.
9.26.7.4. Fasteners
  1. Except as provided in Sentence (2), shingles shall be fastened with at least 4 nails or staples for 1 m wide shingles so that no nails or staples are exposed.
  2. Where staples with an 11 mm crown are used, shingles shall be fastened with at least 6 staples.
  3. Fasteners may be reduced for narrower shingles in proportion to the width of the shingle or when shingles incorporating interlocking devices are used.
  4. Fasteners referred to in Sentences (1) and (2) shall be located 25 mm to 40 mm from each end of each strip shingle with other fasteners equally spaced between them.
  5. Fasteners referred to in Sentences (1) and (2) shall be located not less than 12 mm above the tops of the cutouts.
9.26.7.5. Securing of Tabs
  1. Shingle tabs shall be secured by a spot of plastic cement not exceeding 25 mm diam under the centre of each tab or by interlocking devices or self-sealing strips.
9.26.7.6. Hips and Ridges
  1. Shingles on hips and ridges shall be applied so they extend not less than 100 mm on either side of the hip or ridge, and shall be lapped not less than 150 mm.
  2. Shingles referred to in Sentence (1) shall be fastened with nails or staples on each side located not more than 25 mm from the edge and 25 mm above the butt of the overlying shingle.
9.26.7.7. Eave Protection
  1. Eave protection shall conform to Subsection 9.26.5.
9.26.7.8. Flashing
  1. Flashing shall conform to Subsection 9.26.4.

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