Orange County NC Website
Browse       Search
DocuSign Envelope ID: 313DA256 -1EDE- 4396- A716- 4C53B809027E <br />JERRY M. PASSMORE CENTER ADDITION AND RENOVATION <br />HILLSBOROUGH, NORTH CAROLINA <br />C. Bonding Adhesive: Manufacturer's standard. <br />D. Slip Sheet: Manufacturer's standard, of thickness required for application. <br />E. Metal Termination Bars: Manufacturer's standard, predrilled stainless -steel or aluminum bars, <br />approximately 1 by 1/8 inch (25 by 3 mm) thick; with anchors. <br />F. Metal Battens: Manufacturer's standard, aluminum- zinc - alloy- coated or zinc - coated steel sheet, <br />approximately 1 inch wide by 0.05 inch thick (25 mm wide by 1.3 mm thick), prepunched. <br />G. Fasteners: Factory- coated steel fasteners and metal or plastic plates complying with corrosion - <br />resistance provisions in FM Approvals 4470, designed for fastening membrane to substrate, and <br />acceptable to membrane roofing system manufacturer. <br />H. Miscellaneous Accessories: Provide pourable sealers, preformed cone and vent sheet flashings, <br />preformed inside and outside corner sheet flashings, T joint covers, lap sealants, termination <br />reglets, and other accessories. <br />2.3 VAPOR RETARDER <br />A. Polyethylene Film: ASTM D 4397, 6 mils (0.15 mm) thick, minimum, with maximum <br />permeance rating of 0.13 perm (7.5 ng /Pa x s x sq. m). <br />1. Tape: Pressure- sensitive tape of type recommended by vapor- retarder manufacturer for <br />sealing joints and penetrations in vapor retarder. <br />2. Adhesive: Manufacturer's standard lap adhesive, FM Approvals approved for vapor - <br />retarder application. <br />2.4 ROOF INSULATION <br />A. General: Preformed roof insulation boards manufactured or approved by TPO membrane <br />roofing manufacturer, selected from manufacturer's standard sizes suitable for application, of <br />thicknesses indicated and that produce FM Approvals- approved roof insulation. <br />B. Polyisocyanurate Board Insulation: ASTM C 1289, Type II, Class 1, Grade 3, felt or glass -fiber <br />mat facer on both major surfaces. <br />C. Tapered Insulation: Provide factory- tapered insulation boards fabricated to slope of 1/4 inch <br />per 12 inches (1:48) unless otherwise indicated. <br />D. Provide preformed saddles, crickets, tapered edge strips, and other insulation shapes where <br />indicated for sloping to drain. Fabricate to slopes indicated. <br />2.5 INSULATION ACCESSORIES <br />A. General: Furnish roof insulation accessories recommended by insulation manufacturer for <br />intended use and compatibility with membrane roofing. <br />THERMOPLASTIC POLYOLEFIN (TPO) ROOFING (Alternate G -2) (Addendum #1) 075423 -6 <br />