There are two general types of polymer modified bitumen membrane systems, atactic polypropylene (APP) and styrene butadiene styrene (SBS). These polymer modified membranes differ in chemical characteristics. Both modified bitumen membrane types are thick, heavyweight membranes, reinforced with either polyester, fiberglass or a combination of both. Modified bitumen membranes commonly come with a factory applied mineral, granule surface or an approved coating which is applied after the product is installed.
Modified bitumen roofing systems offer the redundancy of built-up roofing with the added strength, flexibility and UV resistance of a modified bitumen membrane. Advantages of modified bitumen roofing are:
- Proven history
- Tough, durable roof
- High resistance to roof top traffic
- High puncture and tear resistant
- Variety of application
- Easily maintained
With 20 years of commercial roofing experience, Academy Roofing is your source for any new roof construction or commercial roof repair. Academy Roofing is always ready to help.