modified-bitumen roof

In by Jackie Dunn

A roof covering that is typically composed of a factory-fabricated composite sheet consisting of a copolymer-modified bitumen, often reinforced with polyester and/or fiberglass, and installed in one or more plies. The membrane is commonly surfaced with field-applied coatings, factory-applied granules, or metal foil. The roofing system may incorporate rigid insulation.

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