Multiple Ply Modified Bitumen Roof Membrane

Modified bitumen roof systems typically consist of one two or three ply systems.

Multiple ply modified bitumen roof membrane.

Originally it was primarily used against a building s foundation however it eventually made its way up on to the roof. Modified bitumen has been around since the late 1800 s. Multi ply modified bitumen membranes have a stable thickness while single ply membranes have annual thickness loss due to weathering. Synthetic rubber thermoset modified bitumen and thermoplastic membrane.

The most popular version of this was the old tar and gravel roofing membrane. It contains a base sheet with no granule and a cap sheet with granule protection. These reinforced rolled sheets can be adhered by. Like built up roofing bur it is usually installed on low slope and flat roof structures.

Modified bitumen roofing systems. Membrane roofing is often used on commercial flat roofs. Evolved from time tested bur roofs the standard commercial roof application for over 100 years modified bitumen roofs have membranes modified with sbs to attain rubber like. Both can be used on commercial roofs and the best choice often depends on the business owners roofing needs and goals.

Designed for flat or low sloped applications the modified bitumen roofing system has a long proven track record. Environment weather and even the use of the building can affect which adhesive is right for the job. We also cover spray applied foam and liquid roofing options. It is asphalt based and has multiple layers of composite materials to increase flexibility and durability.

Common flat roof membranes discussed in this article include built up asphalt tar and gravel modified bitumen and single ply membranes like epdm pvc tpo and kee. But how do you know which choice is best for your project. Modified bitumen roof system is a two ply application waterproofing system. Modified bitumen is a type of membrane roofing.

During the 1950 s sbs modified bitumen also known as torch on roofing was. Modified bitumen roofs have been used in the u s. Modified bitumen is an evolution of asphalt roofing and they are made using asphalt along with a variety of rubber modifiers and solvents. Many of our commercial roofing customers do not know the differences between modified bitumen and single ply roofing systems.

They have 3 types. The variety of single ply roofing membrane adhesives available gives contractors some flexibility in their choice of material. The shortcomings of single ply and typical asphalt can be largely avoided by using roofing materials that combine multiple membrane layers sealed with an enhanced form of asphalt called sbs modified bitumen. Application of this type of roofing is less labor intensive than the built up roofing method that applies several layers to create a waterproof membrane.

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