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Roofingaka: mod bitaka: MBaka: SBS membraneaka: APP membrane

Modified Bitumen

In Plain English

An improved asphalt roofing membrane for flat roofs — more flexible and durable than traditional built-up roofing.

Definition

A bituminous roofing membrane manufactured with polymer modifiers (APP or SBS) that improve flexibility, strength, and durability compared to traditional BUR systems. Modified bitumen can be applied using torch, hot asphalt, cold adhesive, or self-adhered methods. It is typically installed in two layers (base sheet and cap sheet) and is used on low-slope roofs in commercial and residential construction.

Example

Torch-applied modified bitumen was selected for the retail center re-roof due to its proven performance in the region's freeze-thaw climate.

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