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

Smooth modified bitumen roofing requires specific technical standards to ensure durability and performance. Key requirements include a minimum thickness of 3 mm, a softening point of at least 100°C, and a tensile strength of 1.5 MPa. The roofing membrane should exhibit excellent flexibility at low temperatures, typically below -15°C, and possess high resistance to UV radiation and thermal aging. Additionally, proper adhesion to substrates and compatibility with other roofing materials are essential for optimal performance.