Modified Bitumen Roof Specialists

Modified Bitumen roof systems are asphalt based roofs that provide superior waterproofing characteristics. The typical life span for these systems is about 10 to 20 years. Modified Bitumen roofs are usually put on as a two ply system and are always fully adhered when installed.


These roof systems use asphalt that is modified with a polymer to create plastic or rubber like properties. The modifiers help increase the system’s resistance to brittleness, cold temperatures and increase the elasticity and strength of the roof.

Modified Bitumen Roof Systems

Engineered Modified Bitumen (MB) originated in Europe in the mid-1960’s. Engineered modified bitumen roofing membranes have been used successfully in the United States and Canada since approximately 1975. Factory applied mineral surfaces, gravel surfaces, smooth surfaces, and “cool roof” coatings are some of the surfacing options for APP and SBS modified roofs which are highly reflective coatings that can help save on cooling costs.

Modified Bitumen is closely related to Built-up-Roof (BUR) designed for building with low-slope or “flat” roof structures.

The Look & Protection You Want‎

We deliver peace of mind to building owners and facility managers by managing roofing and building life cycles for customers in all industries. With a choice of cold- or hot-application and a range of performance levels, each one provides exceptional waterproofing protection for your building

Modified Bitumen Roofing Specialists

The APP modified asphalt is reinforced with a polyester mat and manufactured into a roll product. These membranes have extra asphalt on the back side which allows it to bond to the substrate through applications such as heat welded or torch applied methods.

Torch Applied – The APP modified membrane is applied to your building with an open flame torch to melt the bottom side of the sheet as it is being applied.

Heat Welding – A welder is used to blow out hot air which then fuses the back side of the membrane to the substrate. This method is a safer alternative than torch applied, as it is less of a fire hazard.

Hot Asphalt application – Hot Asphalt is applied to the felts or substrate with the use of a machine, while it can also be physically mopped down. The membrane is then laid over the hot asphalt. The hot asphalt acts as the adhesive and allows the membrane to bond to the substrate.

Cold Adhesive – The modified membrane is set in a cold process using specially formulated asphalt based adhesives as it is being applied.

Self Adhered – The bottom surface of the membrane is covered with an adhesive and release paper. Once the paper is removed the adhesive allows the membrane to adhere to the substrate without the use of additional adhesives.