CCAC West Hills Campus WHC Main Roof Project WHC Main Roof Project
Date of Issue (05/26/2022)
2. Impact Resistance: Roof membrane shall resist impact damage when tested according to ASTM D3746/D3746M, ASTM D4272/D4272M, or the "Resistance to Foot Traffic Test" in FM Approvals 4470. B. Flashings and Fastening: Comply with requirements of Division 07 Sections “Sheet Metal Flashing and Trim” and “Roof Specialties.” Provide base flashings, perimeter flashings, detail flashings and component materials and installation techniques that comply with requirements and recommendations of the following: 1. NRCA Roofing Manual (Sixth Edition) for construction details and recommendations. 2. SMACNA Architectural Sheet Metal Manual (Seventh Edition) for construction details. C. Exterior Fire-Test Exposure: ASTM E108, Class A; for application and roof slopes indicated, as determined by testing identical membrane roofing materials by a qualified testing agency. Materials shall be identified with appropriate markings of applicable testing agency.
2.3
MATERIALS, GENERAL
A. Material Compatibility: Roofing materials shall be compatible with one another and adjacent materials under conditions of service and application required, as demonstrated by roof membrane manufacturer based on testing and field experience. 2.4 THERMOPLASTIC MEMBRANE MATERIALS A. PVC Roof Membrane: 1. Thermoplastic PVC/TPA sheet, internally fabric reinforced, Energy Star qualified, CRRC listed, and California Title 24 Energy Code compliant, ASTM D4434 Type IV. a. Basis of design product: Tremco, TPA Single Ply Roof Membrane. b. Tensile Strength at 0 deg. F (-18 deg. C), minimum, ASTM D751: 300 lbf/in (1330 N). c. Tear Strength at 77 deg. F (25 deg. C), minimum, ASTM D751: 100 lbf (440 N). d. Elongation at 0 deg. F (-18 deg. C), minimum at fabric break, ASTM D751: 25 percent machine direction, 25 percent cross-machine direction. e. Minimum Thickness, nominal, ASTM D751: 0.060 in (1.5 mm). f. Color: White. g. Solar Reflectance Index (SRI), ASTM E1980: 108 (White, initial) 84 (White, 3- year aged). h. Recycled Content, minimum: 25 percent pre-consumer.
075419 - Page 6 of 14 POLYVINYL-CHLORIDE (PVC/TPA) ROOFING
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