Although built-up roofs are the oldest type of low-slope roofing systems, gaining an understanding of the advantages and characteristics of modified bitumen membranes will help you select the asphalt roofing system that improves performance and saves on installation costs over traditional asphalt roofs. Learn how “mod bit” roofs, whether APP or SBS, provide improved durability with stronger reinforcements, resist hail and traffic damage, and provide factory-controlled quality manufacturing.