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1518.7 Asphaltic Shingles
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Asphaltic shingles layout, alignment and placement of mechanical attachment shall be in compliance with the product approval, and shall be installed in accordance with RAS 115.
Underlayments meeting or exceeding minimum underlayment specifications, as detailed in Section 1518, shall be applied in compliance with the application methods detailed in the product approval. Where the architectural appearance of the underside of the roof is to be preserved, refer to Section 1519.5.2.
Installation of all asphaltic shingles shall be limited to a roof mean height of 33 feet (10 m), unless otherwise specifically noted in the product approval.
The asphaltic shingle product approval shall meet the following minimum requirements.
Where asphaltic shingles are to be installed over insulated roof deck, a suitable nailable substrate, in accordance with Section 1520.5.7 must be installed over the insulation prior to the installation of approved underlayment and shingles.
Asphaltic shingles shall be installed in compliance with the product approval, but in no case with less than six approved roofing nails or approved fastening devices which penetrate through the thickness of sheathing or wood plank a minimum of 3/16 inch (4.8 mm) or penetrate into a 1 inch (25 mm) or greater thickness of lumber a minimum of 1 inch (25 mm), except where architectural appearance is to be preserved, in which case a minimum of 3/4 inch (19 mm) ring shank roofing nail may be used.
Intersections, eaves, rakes, valleys, gable ends, and the starter course of asphaltic shingles shall be set in an 8-inch (203 mm) wide bed of approved cold adhesive or roofing cement. Application of adhesive or cement shall be in compliance with the application instructions of the product approval. Shingles shall not extend more than 1/4 inch (6.4 mm) beyond the eave drip.
All perimeter termination and valleys shall be fabricated from metal. Minimum metal requirements are set forth in Section 1517.6 and RAS 111.
Asphaltic shingles shall be tested in compliance with the provisions set forth in Section 1523.
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