Modified Bitumen Roofing Installation

Asphalt-based for durability & weather resistance

Guy New Mod Bit Pic

Modified Bitumen Roofing

Modified Bitumen Roof Systems are an asphalt-based product designed for buildings with low-slope or flat roof structures. The use of superior polymers along with high-strength reinforcements ensures customers receive the maximum life-cycle return on their capital roofing investment.

Manufacturing Method

Modifiers are added to standard roofing asphalt to replace plasticizers removed during the distillation process. Bitumen is reinforced with fiberglass or polyester fiber matting in order to increase durability and strength.

The two most common types are SBS and APP. The use of SBS (styrene-butadiene-styrene) increases the flexibility of the membrane and allows it to have stronger expansion and contraction capabilities. APP (attactic polypropylene) increases the aging ability of the roof system. SBS is often the more popular system as the synthetic rubber additive increases the products flexibility.

Application Method

Modified bitumen roof systems can be installed with the common torch method, asphalts, or cold adhesives. A standard SBS modified bitumen roof system is a two-ply system applied in rolls that overlap the edge of the previous roll.

Guy Roofing Mod Bit Install Photo

Advantages of Modified Bitumen

One way to enhance the performance and longevity of a low-slope roofing system is by applying a Modified Bitumen Roofing Membrane. These systems have a proven track record of performance with long-term manufacturer warranties available.

Durable Weather resistant Easy to repair

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