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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />STYRENE-BUTADIENE-STYRENE (SBS) MODIFIED BITUMINOUS MEMBRANE ROOFING <br /> 07 52 16 - 8 <br /> <br /> <br />B. Fasteners: Factory-coated steel fasteners and metal or plastic plates complying <br />with corrosion-resistance provisions in FM Approvals 4470, designed for fastening <br />roof insulation and cover boards to substrate, and acceptable to roofing system <br />manufacturer. <br />1. Recycled Content: Postconsumer recycled content plus one-half of <br />preconsumer recycled content not less than 25 percent. <br />C. Insulation Adhesive: Insulation manufacturer's recommended adhesive formulated <br />to attach roof insulation to substrate or to another insulati on layer as follows: <br />1. Full-spread spray-applied, low-rise, two-component urethane adhesive. <br />2. Adhesives and sealants shall comply with the following limits for VOC content: <br />a. Plastic Foam Adhesives: 50 g/L. <br />b. Gypsum Board and Panel Adhesives: 50 g/L. <br />c. Multipurpose Construction Adhesives: 70 g/L. <br />d. Fiberglass Adhesives: 80 g/L. <br />e. Contact Adhesives: 80 g/L. <br />f. PVC Welding Compounds: 510 g/L. <br />g. Other Adhesives: 250 g/L. <br />h. Single-Ply Roof Membrane Sealants: 450 g/L. <br />i. Nonmembrane Roof Sealants: 300 g/L. <br />j. Sealant Primers for Nonporous Substrates: 250 g/L. <br />k. Sealant Primers for Porous Substrates: 775 g/L. <br />D. Insulation Cant Strips: ASTM C 208, Type II, Grade 1, cellulosic-fiber insulation <br />board. <br />E. Cover Board: ASTM C 1177/C 1177M, glass-mat, water-resistant gypsum board or <br />ASTM C 1278/C 1278M, fiber-reinforced gypsum board. <br />1. Manufacturers: Subject to compliance with requirements, provide products by <br />one of the following: <br />a. CertainTeed Corporation. <br />b. Georgia-Pacific Building Products. <br />c. National Gypsum Company. <br />d. USG Corporation. <br />2. Thickness: 1/4 inch. <br />3. Surface Finish: Unprimed. <br />4. Recycled Content: Postconsumer recycled content plus one-half of <br />preconsumer recycled content not less than 25 percent. <br />2.10 ASPHALT MATERIALS <br />A. Asphalt Primer: ASTM D 41/D 41M. <br />B. Roofing Asphalt: ASTM D 312/D 312M, Type III or IV as recommended by roofing <br />system manufacturer for application.