During the roof installation process, a modified bitumen roof might be recommended to some commercial
properties when a regular single-ply
or built up roofing might not be sustainable. In short, a Polymer-Modified Bitumen Sheet Membrane roof is a manufactured roof with extra strength and durability. Instead of being applied like a built up roof
(repetitive layers adhered together to form a membrane), a modified roof is a two-ply roofing system designed for quick installation.