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INDIAN RIVER COUNTY — NORTH COUNTY REGIONAL PARK PAGE 14 <br />AQUATIC FACILITY ROOFING REPLACEMENT SECTION 075216 <br />JUNE 7, 2019 MODIFIED BITUMINOUS MEMBRANE ROOFING <br />for or caused by defects or deficiencies in substrate shall be performed at no additional <br />cost. <br />3.4 PREPARATION <br />A. Protect adjacent surfaces from staining or soiling caused by roofing application. Prevent <br />liquid materials from entering or clogging drains, pipes, conduits or conductors. Prevent <br />foreign materials from entering or clogging roof drains, stoppers or downspouts. <br />B. Apply primer to concrete and masonry substrates per manufacturer's written instructions. <br />C. Prime all sheet metal to be embedded in roofing system including, but not limited to, <br />gravel stops, scuppers, edge trim and lead drain flashing with cut-back asphalt. <br />D. ROOF MEMBRANE INSTALLATION <br />1. Apply two ply membrane system. <br />2. Torching: <br />a. Torch Safety: Crew members handling torches shall be trained by an <br />Authorized Certified Roofing Torch Applicator (CERTA) Trainer, be certified <br />according to CERTA torch safety guidelines as published by the National <br />Roofing Contractor's Association (NRCA), and follow torch safety practices as <br />required by the contractor's insurance carrier. Designate one person on each <br />crew to perform a daily fire watch. The designated crew member shall watch <br />for fires or smoldering materials on all areas during roof construction activity, <br />and for the minimum period required by CERTA guidelines after roofing <br />material application has been suspended for the day. Submit CERTA <br />certificates to Owner prior to construction. <br />b. Uniformly heat lower surface and preheat substrate to provide for an even, <br />continuously flow of melted bitumen under sheet. A small bead of bitumen <br />should be visible along both seams and under leading edge as membrane is <br />unrolled. <br />c. Do not allow torch to contact flammable materials. <br />d. Use extreme caution when working around gas lines, electrical services and <br />mechanical units. <br />e. Never place the hot torching device onto in-place membrane. <br />f. Provide fire extinguishers on roof during torching. Comply with applicable fire <br />and safety regulations. <br />g. Provide inspection of the roofing for one (1) hour after termination of torching to <br />check for smoldering or hot materials. <br />3. Apply layers of roofing free of wrinkles, creases or fishmouths. Exert sufficient <br />pressure on roll during application to ensure prevention of air pockets. <br />a. For slopes less than 2 1/2 in 12, apply sheets straight, perpendicular to slope <br />and shingled in direction of flow starting from low points. <br />