Low Slope - Built-up and Modified Bitumen

Both systems are very common in commercial roofing. Both offer economy, strength, fire resistance and durability.

Built-up
(BUR) remains the industry standard offering protection to flat and low slope roofs. These membranes are referred to as built-up due to a process of overlapping several layers of roofing felts with hot or cold adhesives. The felts are made of organic, fiberglass or polyester composition. The hot adhesives will be one of three (3) types; asphalt, modified asphalt or coal tar pitch. The cold adhesives are either asphalt or coal tar pitch. A layer of gravel is applied which protects the roof from the weather. If you would like more information, click Contact Us or Get a Quote.

Modified Bitumen
offers more flexibility and impact resistance, as well as performs great in low temperatures. Increased resistance to brittleness at cold temperatures, great flow resistance at high temperatures, and increased elasticity can be achieved by blending synthetic rubberized polymers with asphalt in lieu of modification by blowing processes. The result is a membrane that combines the multi-layer benefits of a built-up roof with the installation advantages of a single-ply membrane. Modified membranes are available in smooth surfaced or granulated rolls that can be heat welded, cold or hot applied. If you would like more information, click Contact Us or Get a Quote.