Products / CertainTeed GlasBase Base Sheet

Non-modified, permeable asphaltic base sheet with fiberglass reinforcement for low-slope roof systems, mechanically fastened or hot-applied. It is 1.0 mm (40 mils) thick, weighs 75 lbs per roll and covers three squares. CertainTeed lists it as meeting ASTM D4601 Type II and UL G2. Warranty terms of ten to twenty-five years depend on the system specification and product selection.