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Modified Bitumen Roofing

fort worth commercial roofing modified bitumen

Modified bitumen membranes were developed in Europe in the early 1960s and have been in use in the U.S. since the mid-1970s. Modified Bitumen is asphalt that has had modifiers added to it to give it plastic or rubber-like properties. They are typically installed as a two-ply system and are almost always fully adhered.

Old Pro roofing installs two types of modified bitumen membranes: SBS polymer-modified bitumen and APP polymer modified bitumen. SBS modifiers are commonly installed in hot moppings of asphalt or cold adhesive. Many of the new products are even available in a self-adhering roll. APP modifiers are usually heat welded or applied using a torch. SBS modifiers give asphalt a rubberized quality, while APP modifiers give it a more plasticized quality.

Most of the modified bitumen products used by Old Pro Roofing have a mineral coated surface but it is also available with a smooth surface. When installing modified bitumen, we typically tear the old roof off down to the decking. We then install fiber-board insulation on top of the decking to increase strength and moisture resistance. Next, a base sheet is installed which is either mechanically fastened or self-adhered. The final step is to install the modified bitumen membrane which can be hot-mopped, torched, or applied using a cold process.

Modified Bitumen is a great choice that has a proven track record in commercial and residential roofing applications. Let the pros at Old Pro Roofing show you how modified bitumen may be a great choice for your commercial or residential flat roof.

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