Used as an alternative to BUR systems, modified bitumen is a roofing membrane consisting of asphalt and plastic or rubber polymers, and is considered an progression of asphalt built-up roofing (BUR). Modified Bitumen is an asphalt-based roofing system, similar to the Built-up-Roof (BUR) and is designed for buildings with flat or low-slope or roof structures. Modified Bitumen can be installed by the torch-application method, or applied with a cold-process adhesives. Modified Bitumen is built and designed to withstand the harsh exposure to extreme environmental elements such a storms and Mother Nature. With it’s proven track record, superior waterproofing characteristics and multiple layers of protection, it’s one of the most trusted flat roofing systems used in the commercial industry.