Modified Bitumen Roof Maintenance
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Description
Modified bitumen's, like built-up roofing, are made of reinforced asphalt impregnated felts. However, unlike BURs, the asphalt in the felts is modified with plastic or rubber polymers (hence the name) to improve its elasticity, durability, and overall performance. Because of the added polymers, modified bitumen is often applied in a single layer with overlapping seams. They can be "glued" to the roof with hot asphalt or an adhesive, or by using propane torches to melt the asphalt underside. Some modified bitumen requires protective surfacing materials, usually mineral granules or a liquid coating.
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Modified Bitumen Roof Maintenance
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