The process parameters that influence torch-applied modified bitumen roofing include the temperature of the torch, the speed of application, and the ambient conditions. The torch temperature must be sufficient to properly melt the bitumen without damaging the membrane. Application speed affects the adhesion quality; too fast may result in inadequate bonding. Additionally, ambient temperature and humidity can impact the curing process and overall performance of the modified bitumen roofing system. Proper control of these parameters ensures optimal installation and durability.