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
