Division 7 Ebook Page 475 Fiberglass-Based Asphalt Shingles & Accessories, 07 31 00

Fiberglass-Based Asphalt Shingles & Accessories B. All fasteners must be driven flush with the shingle surface and penetrate at least 3/4 in (19.1 mm) into the wood deck. Where the deck is less than 3/4 in (19.1 mm) thick, the fastener should be long enough to penetrate fully and extend through roof sheathing. 2.10 METAL FLASHING A. Flashing: Provide flashing as specified by Section 07600 - Metal Flashing and Sheet Metal. PART 3 EXECUTION 3.1 EXAMINATION A. Prior to starting work, examine all roof decks on which work is to be applied for defects in materials and workmanship which may be detrimental to the proper installation or long-term performance of the shingles. B. Underlayment and shingles installed directly over roof insulation or similar type decks is not approved. 1. Roof deck must be dry, minimum 25/32 in (19.8 mm) thick, minimum 6 in (152 mm) wide boards with maximum 1/4 in (6.4 mm) spaces, or APA rated sheathing (exposure 1): minimum 3/8 in (9.5 mm) plywood, minimum 7/16 in (11.1 mm) oriented strand board. Consult your manufacturer for other approved constructions. 2. Ventilation under the roof deck must meet local code requirements. C. Do not begin installation until the roof deck has been properly prepared. D. If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding. Commencement of installation constitutes acceptance of conditions. 3.2 PREPARATION

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