“Modified bitumen”

“Modified bitumen”

“Modified bitumen” might be an unfamiliar term to many people who aren’t in the roofing industry, but it is a common choice in commercial roofing and other flat or nearly-flat roofs. Bitumen is also known as asphalt, which has been used in roofing for over 100 years. In the 1960s, modified bitumen was developed in order to create a roofing material that has all the physical properties of asphalt along with additional flexibility and weathering benefits of plastic or rubber. BassTech International supplies the roofing industry with the most common bitumen modifiers, SBS (styrene-butadiene-styrene) and APP (atactic polypropylene).

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