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Ballasted Single Ply Roofing



Perimeter securement is required as part of the detailing of ballasted single ply roof membrane to counteract the natural tendency of the membrane to shrink over time. If this securement fails, the membrane is said to be tenting and stone rolls down the slope. The unballasted membrane will flutter in the wind and bounce the stone further from the parapet. This condition should be addressed immediately or the roof may blow off - see Image 3.