CCAC West Hills Campus WHC Main Roof Project WHC Main Roof Project
Date of Issue (05/26/2022)
1. Joint Sealant, Polyurethane: ASTM C920, Type S, Grade NS, Class 50 single-component moisture curing sealant, formulated for compatibility and use in dynamic and static joints; paintable. a. Basis of design product: Tremco, TremSEAL Pro. b. Volatile Organic Compounds (VOC), maximum, ASTM D3960: 40 g/L. c. Hardness, Shore A, ASTM C661: 40. d. Adhesion to Concrete, ASTM C794: 35 pli. e. Tensile Strength, ASTM D412: 350 psi (2410 kPa). f. Color: Limestone. F. Prefabricated Pipe Flashings: As recommended by roof membrane manufacturer. G. Miscellaneous Accessories: Provide pourable sealers, preformed cone and vent sheet flashings, preformed inside and outside corner sheet flashings, T-joint covers, lap sealants, termination reglets, and other accessories.
2.6
ROOF INSULATION MATERIALS
A. General: Preformed roof insulation boards manufactured or approved by roofing manufacturer, selected from insulation manufacturer's standard sizes, suitable for application, and of thicknesses indicated. 1. Tapered Insulation: Provide factory-tapered insulation boards fabricated to slope of 1/8 inch per 12 inches (1:96) unless otherwise indicated. 2. Provide preformed saddles, crickets, tapered edge strips, and other insulation shapes where indicated for sloping to drain. Fabricate to slopes indicated, not less than two times the roof slope. B. Roof Insulation: Provide roof insulation product in thicknesses indicated in Part 3 as follows: 1. Board Insulation, Polyisocyanurate: CFC- and HCFC- free, with recycled content glass- fiber mat facer on both major surfaces, ASTM C1289 Type II Class 1. a. Compressive Strength, ASTM D1621: Grade 2: 20 psi (138 kPa). b. Conditioned Thermal Resistance at 75 deg. F (24 deg. C): 14.4 at 2.5 inches (50.8 mm) thick. 2.7 ROOF INSULATION ACCESSORIES A. Tapered Edge Strips: ASTM C208, Type II, Grade 1, cellulosic-fiber insulation board.
075419 - Page 8 of 14 POLYVINYL-CHLORIDE (PVC/TPA) ROOFING
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