What technical requirements define gaf modified bitumen roof system for asphalt or bitumen modification?

The technical requirements for a GAF modified bitumen roof system include the use of high-quality polymer-modified bitumen, which enhances flexibility and resistance to UV degradation. The system must comply with ASTM standards for roofing membranes, ensuring proper adhesion, tensile strength, and elongation properties. Additionally, the installation process requires a clean substrate, appropriate primer application, and proper heat welding or torch application techniques to ensure a watertight seal and durability against environmental factors.