What technical requirements define white modified bitumen roofing for asphalt or bitumen modification?

White modified bitumen roofing requires specific technical standards to ensure performance and durability. Key requirements include a minimum softening point of 100°C, a tensile strength of at least 1.5 MPa, and elongation properties exceeding 30%. The bitumen must be modified with polymers, such as SBS or APP, to enhance flexibility and UV resistance. Additionally, the roofing membrane should have a reflective surface to reduce heat absorption, contributing to energy efficiency and longevity.