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DocuSign Envelope ID: 313DA256 -1EDE- 4396- A716- 4C53B809027E <br />JERRY M. PASSMORE CENTER ADDITION AND RENOVATION <br />HILLSBOROUGH, NORTH CAROLINA <br />PART 3 - EXECUTION <br />3.1 EXAMINATION <br />A. Examine substrates, areas, and conditions, with Installer present, for compliance with the <br />following requirements and other conditions affecting performance of roofing system: <br />1. Verify that roof openings and penetrations are in place and curbs are set and braced and <br />that roof drain bodies are securely clamped in place. <br />2. Verify that wood blocking, curbs, and nailers are securely anchored to roof deck at <br />penetrations and terminations and that nailers match thicknesses of insulation. <br />3. Verify that minimum concrete drying period recommended by roofing system <br />manufacturer has passed. <br />4. Verify that concrete substrate is visibly dry and free of moisture. Test for capillary <br />moisture by plastic sheet method according to ASTM D 4263. <br />5. Verify that concrete curing compounds that will impair adhesion of roofing components <br />to roof deck have been removed. <br />B. Proceed with installation only after unsatisfactory conditions have been corrected. <br />3.2 PREPARATION <br />A. Clean substrate of dust, debris, moisture, and other substances detrimental to roofing installation <br />according to roofing system manufacturer's written instructions. Remove sharp projections. <br />B. Prevent materials from entering and clogging roof drains and conductors and from spilling or <br />migrating onto surfaces of other construction. Remove roof -drain plugs when no work is taking <br />place or when rain is forecast. <br />C. Complete terminations and base flashings and provide temporary seals to prevent water from <br />entering completed sections of roofing system at the end of the workday or when rain is <br />forecast. Remove and discard temporary seals before beginning work on adjoining roofing. <br />3.3 VAPOR - RETARDER INSTALLATION <br />A. Polyethylene Film: Loosely lay polyethylene -film vapor retarder in a single layer over area to <br />receive vapor retarder, side and end lapping each sheet a minimum of 2 inches (50 mm) and 6 <br />inches (150 mm), respectively. <br />1. Continuously seal side and end laps with tape or adhesive. <br />B. Completely seal vapor retarder at terminations, obstructions, and penetrations to prevent air <br />movement into membrane roofing system. <br />THERMOPLASTIC POLYOLEFIN (TPO) ROOFING (Alternate G -2) (Addendum #1) 075423 -8 <br />