The key process parameters influencing modified bitumen roofing include the type and concentration of modifiers (such as SBS or APP), the temperature during the blending process, and the duration of mixing. Additionally, the viscosity and softening point of the base bitumen, as well as the cooling rate after modification, play crucial roles in determining the final product’s performance characteristics, such as elasticity, durability, and resistance to UV degradation. Proper control of these parameters ensures optimal roofing material quality.