Modified Bitumen

Modified Bitumen Considerations

Rubberized asphalt is applied to rolled roofing felts at the factory. Typically a modified system consists of a minimum of two layers of membrane, a base sheet and a cap sheet . Two Types: APP (Atactic Polypropylene) and SBS (Styrene Butadiene Styrene)

  • Benefits

    • Wide variety of installation methods. Can be set with hot asphalt, cold adhesives or torched in place
    • Granular cap sheets are available in several colors
    • Energy Star High Reflectivity Cap Sheets are available

  • To Consider

    • Requires skilled workers
    • Fire danger from torches

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