Reso 2025-3808 - Laserfiche WebLink

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City of Sunny Isles P2, Lower East Roof Sections A. General: Clean surfaces thoroughly prior to installation. 1. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions. 2. Fill substrate surface voids that are greater than 1/4 inch wide with an acceptable fill material. 3. Roof surface to receive roofing system shall be smooth, clean, free from loose gravel, dirt and debris, dry and structurally sound. 4. Wherever necessary, all surfaces to receive roofing materials shall be power broom and vacuumed to remove debris and loose matter prior to starting work. 5. Do not apply roofing during inclement weather. Do not apply roofing membrane to damp, frozen, dirty, or dusty surfaces. 6. sheets attached with cap nails require a minimum pullout capacity of 40 Ib. per nail. 7. Prime decks where required, in accordance with requirements and recommendations of the primer and deck manufacturer. 3.3 INSTALLATION - GENERAL A. Install modified bitumen membranes and flashings in accordance with manufacturer's instructions and with the recommendations provided by the National Roofing Contractors Association's Roofing & Waterproofing Manual, the Asphalt Roofing Manufacturers Association, and applicable codes. B. General: Avoid installation of modified bitumen membranes at temperatures lower than 40- 45 degrees F. When work at such temperatures unavoidable use the following precautions: 1. Take extra care during cold weather installation and when ambient temperatures are affected by wind or humidity, to ensure adequate bonding is achieved between the surfaces to be joined. Use extra care at material seam welds and where adhesion of the applied product to the appropriately prepared substrate as the substrate can be affected by such temperature constraints as well. 2. Unrolling of cold materials, under low ambient conditions must be avoided to prevent the likelihood of unnecessary stress cracking. Rolls must be at least 40 degrees F at the time of application. If the membrane roll becomes stiff or difficult to install, it must be replaced with roll from a heated storage area. C. Commence installation of the roofing system at the lowest point of the roof (or roof area), working up the slope toward the highest point. Lap sheets shingle fashion so as to' constantly shed water 3.4 INSTALLATION COLD APPLIED ROOF SYSTEM A. Base Ply: Cut base ply sheets into 18 -foot lengths and allow plies to relax before installing. Install base sheet in interply adhesive applied at the rate required by the manufacturer. Shingle base sheets uniformly to achieve one ply throughout over the prepared substrate. Shingle in proper direction to shed water on each large area of roofing. 1. Lap ply sheet ends 8 inches. Stagger end laps 12 inches minimum. 2. Solidly bond to the substrate and adjacent ply with specified cold adhesive at the rate of 2 to 2-1/2 gallons per 100 square feet. 3. Roll must push a puddle of adhesive in front of it with adhesive slightly visible at all side laps. Use care to eliminate air entrapment under the membrane. 4. Install subsequent rolls of modified across the roof as above with a minimum of 4 -inch side laps and 8 -inch staggered end laps. Lay modified membrane in the same direction as the underlayers but the laps shall not coincide with the laps of the base layers. 5. Extend plies 2 inches beyond top edges of cants at wall and projection bases. 6. Install base flashing ply to all perimeter and projection details. 7. Allow the one ply of base sheet to cure at least 30 minutes before installing the modified membrane. However, the modified membrane must be installed the same 07 52 00 -8