Several factors influence a modified bitumen roofing system, including the type of polymer used for modification (such as APP or SBS), the application method (torch-applied, self-adhered, or cold-applied), and the specific formulation of the bitumen. Environmental conditions, such as temperature and UV exposure, also play a crucial role in performance. Additionally, the roofing system’s design, including insulation and drainage, impacts its overall effectiveness and longevity. Proper installation techniques are essential for optimal performance.