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SHSC HVAC and Roof Replacement Smith Sinnett / 2020072 <br />Orange County, North Carolina <br /> <br /> <br />THERMOPLASTIC MEMBRANE ROOFING 07 54 00 - 7 <br />B. Prevent materials from entering and clogging roof drains and conductors and from spilling or migrating <br />onto surfaces of other construction. Remove roof-drain plugs when no work is taking place or when rain <br />is forecast. <br />C. Complete terminations and base flashings and provide temporary seals to prevent water from entering <br />completed sections of roofing system at the end of the workday or when rain is forecast. Remove and <br />discard temporary seals before beginning work on adjoining roofing. <br />D. Install acoustical roof deck rib insulation strips, specified in Division 05 Section "Steel Decking," <br />according to acoustical roof deck manufacturer's written instructions. <br />3.3 INSULATION INSTALLATION <br />A. Coordinate installing membrane roofing system component’s so insulation is not exposed to precipitation <br />or left exposed at the end of the workday. <br />B. Comply with membrane roofing system manufacturer's written instructions for installing roof insulation. <br />C. Install tapered insulation under area of roofing to conform to slopes indicated. <br />D. Install one or more layers of insulation under area of roofing to achieve required thickness. Where <br />overall insulation thickness is 1-1/2 inches 2 inches or greater, install 2 or more layers with joints of each <br />succeeding layer staggered from joints of previous layer a minimum of 6 inches in each direction. <br />E. Trim surface of insulation where necessary at roof drains so completed surface is flush and does not <br />restrict flow of water. <br />F. Install insulation with long joints of insulation in a continuous straight line with end joints staggered <br />between rows, abutting edges and ends between boards. Fill gaps exceeding 1/4 inch with insulation. <br />1. Cut and fit insulation within 1/4 inch of nailers, projections, and penetrations. <br />G. Mechanically Fastened Insulation: Install each layer of insulation and secure to deck using mechanical <br />fasteners specifically designed and sized for fastening specified board-type roof insulation to deck type. <br />1. Fasten to resist uplift pressure at corners, perimeter, and field of roof. Fasteners shall be installed <br />at a spacing not greater than one fastener per 4 square feet area of roof in the field of the roof and <br />not greater than one fastener per 2 square feet area of roof in the perimeter of the roof. <br />H. Coordinate with Part 1 "Performance Requirements" Article. Fastener numbers will increase at corners <br />and perimeter over number required for field of roof. <br />3.4 ADHERED ROOFING MEMBRANE INSTALLATION <br />A. Install roofing membrane over area to receive roofing according to membrane roofing system <br />manufacturer's written instructions. Unroll roofing membrane and allow to relax 30 minutes before <br />installing. <br />1. Install sheet according to ASTM D 5036. <br />B. Start installation of roofing membrane in presence of membrane roofing system manufacturer's technical <br />personnel. <br />C. Accurately align roofing membrane and maintain uniform side and end laps of minimum dimensions <br />required by manufacturer. Stagger end laps. <br />D. Bonding Adhesive: Apply solvent-based bonding adhesive to substrate and underside of roofing <br />membrane at rate required by manufacturer and allow to partially dry before installing roofing membrane. <br />Do not apply bonding adhesive to splice area of roofing membrane. <br />E. Adhesively fasten roofing membrane securely at terminations, penetrations, and perimeter of roofing. <br />F. Apply roofing membrane with side laps shingled with slope of roof deck where possible. <br />G. Seams: Clean seam areas, overlap roofing membrane, and hot-air weld side and end laps of roofing <br />membrane according to manufacturer's written instructions to ensure a watertight seam installation. <br />1. Test lap edges with probe to verify seam weld continuity. Apply lap sealant to seal cut edges of <br />roofing membrane. <br />2. Verify field strength of seams a minimum of twice daily and repair seam sample areas. <br />3. Repair tears, voids, and lapped seams in roofing membrane that does not meet requirements. <br />DocuSign Envelope ID: 17058488-BE46-4277-9E77-433E3054E269