When selecting modified bitumen roofing, several process parameters are crucial. Key factors include the type of polymer used for modification (such as APP or SBS), the thickness of the membrane, and the application method (torch-applied, self-adhered, or cold adhesive). Additionally, environmental conditions, such as temperature and humidity during installation, as well as the specific performance requirements (e.g., UV resistance, flexibility, and durability) should be considered to determine the best purchasing option.