Modified Bitumen Roofing System for commercial, industrial, housing
We offer Modified Bitumen Roofing Service for commercial, industrial, and housing to repair flat roof via one of the best and professional roofers.
Modified bitumen membranes were developed due to the reduction in the quality of asphalt. Oil refineries have been able to pull more products from the raw crude oil, leaving a lower quality asphalt by-product. The asphalt obtained by the roll good manufacturer is then modified with plasticizers or rubbers to create a high-quality asphalt product bonded to a high strength fabric of polyester or fiberglass. These manufactured rolls are applied by heat or attached with an adhesive. The blended or ‘modified’ asphalt has elongation and recovery properties which make it suitable to protect against the stresses created by wind, temperature fluctuation, and normal structural expansion and contraction of the building. Some of these products are also modified to increase their resistance to fire, thus increasing their fire-rating.
APP Modified Rolls The rolls modified with ‘plasticizers’ are called APP rolls (Atactic Polypropylene). These rolls are typically applied by heat-welding the material and seams with a propane torch. The material comes both smooth and also with a granule surfacing. The material is not compatible with all petroleum-based products, greases and oils.
SBS Modified Rolls The rolls modified with ‘rubbers’ are called SBS rolls (styrene-butadiene-styrene). This copolymer is added to produce a roll that is compatible with petroleum products, thus allowing it to be applied with adhesives and mastics or applied by heat-welding. SBS rolls are also used in hybrid roof systems; where a combination of built-up roofing and modified materials around penetrations and curbs may be used.
Torch-Applied Modified Bitumen
Modified Bitumen is a plastic combined with asphalt and applied with a torch. This asphalt blended coating has elongation and recovery properties, and is better able to deal with the stresses created by wind, temperature fluctuation, and normal roof-top expansion and contraction. They also provide fire-resistant properties as would be expected from a conventional built-up roof, without the need to use a heavy gravel cover. Torch-down can also be installed with granules that reflect UV rays and promote moisture evaporation from the roof surface.