Which factors affect modified bitumen vs built up roof in asphalt or bitumen modification systems?

Several factors influence the choice between modified bitumen and built-up roofing (BUR) in asphalt or bitumen modification systems. Key considerations include climate conditions, with modified bitumen offering better flexibility and UV resistance in extreme temperatures. Installation methods differ, as modified bitumen typically requires fewer layers and can be applied using torch, cold adhesive, or self-adhesive techniques. Additionally, cost, durability, maintenance requirements, and the specific application environment play significant roles in determining the most suitable roofing system.