Low-slope roof standard APP modified bitumen membrane filled installation. Prior to starting relax the roofing membrane by laying it down on a flat surface and unrolling it, relaxing the rolls for several minutes releases some of the material memory of the polyester reinforcement that develops from the production process. This will allow the membrane to stretch and lay smoother making for a superior installation. re-roll the membrane and bring it to the location on the where it will be installed. line up the edge of the roll with your lowest starting point, your starting point will vary depending on the design of the building. roll out the whole length of the roll ensuring that the edge of the sheet maintains a straight course adjust its alignment as needed. from one end of the sheet re-roll the membrane about quarter of the length of the roll and from the other end reroll at the rest of the length until both the rolled ends meet. using the roofing torch in an even side-to-side sweeping motion heat up and weld the quarter rolled side for several feet, this will help lock in the alignment of the roll helping to avoid the roll from walking on you and maintaining a straight course. pull the rolled-up membrane towards you using a Shepard set never torch the membrane while standing behind the roll and kicking the roll forward. once several feet of membrane are welded to the deck you may start welding the longer section of the roll to prevent any voids in the membrane adhesion be sure to push the rolled side of the membrane towards the just recently welded short side of the course until it no longer moves. you will see the asphalt peeling up slightly indicating that the welded portion of the membrane has been reached. using the Shepherd's hook to pull the roll forward and the torch in a sweeping side-to-side motion heat up the backside of the membrane until the polyolefin bottom surface markings indicate that the membrane is ready to be welded down. avoid overheating the membrane and be sure to use a steady even pace. For more information contact your Polyglass technical services representative.
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