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0092 Blisters in Built up Roofing Membranes - Flat Roofing - Built up Roofing
 
0092 Blisters in Built up Roofing Membranes - Flat Roofing - Built up Roofing -

Image Text: Cross section > gravel is driven off the rising blister exposing it to ultraviolet or mechanical damage > trapped air/water > gravel > roof sheathing > blister caused by air or water trapped between the ply's of the membrane (or between the sheathing and the membrane) > 4 ply membrane > crater left over from broken blueberry blister permits water penetration that can weaken the roof > gravel > blueberry blister due to air/water trapped in the asphalt > 4 ply membrane > roof sheathing

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ROOFING, Steep Roofing , General, Asphalt Shingles, Wood Shingles and Shakes, Slate , Clay, Concrete and Fiber Cement, Metal, Roll Roofing, Steep Roof Flashings, Valley Flashings, Chimney Flashings, Plumbing Stack Flashings, Roof/Wall Flashings, Hip and Ridge Flashings, Skylights, Solariums, Drip Edge Flashings, Dormer Flashing, Flat Roofing, General , Built-Up Roofing (Tar and Gravel), Modified Bitumen, Synthetic Rubber (Elastomeric, EPDM), Plastic Roofing (PVC, Thermoplastic), Roll Roofing, Flat Roof Flashings

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