#2 Starting a New Roll at the Wall Thermal barrier is present ( ¾ Perlite, ¾ Fiberglass or ¼ Gypsum Board) Back rolls membrane 6 feet away from edge and positions in place Evenly applied heat to back of membrane without burning sheet Lifts corners using trowel and flops into place Sheet is stepped or broomed into place Laps checked with towel for proper seal Flame is never directed at wall penetrations or substrate or used to reheat sheet
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