Asphalt Roofing Systems
Built Up Roofing Installation & Repair Services
The reinforcing fabrics also are called roofing felts or ply sheets. Roofing felts are reinforced with either glass-fiber mats or organic mats. Felts are produced in a standard width of 36 inches and metric width of about one meter.
The bitumen typically used in Built Up Roofing BUR roof systems is asphalt, coal tar, or cold-applied adhesive. The asphalt or coal tar is heated in a kettle or tanker and then applied with a mop or mechanical spreader. Asphalt is a petroleum product refined from crude oil; coal tar is derived from the distillation of coal. Cold-applied adhesives typically are solvent-based asphalts that don’t have to be heated in a kettle or tanker.
Surfacing for built-up roofing systems includes aggregate (such as gravel, slag, or mineral granules), glass-fiber or mineral surfaced cap sheets, hot asphalt mopped over the entire surface, aluminum coatings, or elastomeric coatings. A Built Up Roofing system composed of a built-up roof membrane with two or three plies and a polymer-modified bitumen membrane cap sheet is commonly referred to as a “hybrid” system. NRCA considers this type to be a polymer-modified bitumen membrane system. Click HERE for more information about the GAF BUR roofing system.
Alpine Roofing Construction has 25+ years of commercial roofing experience. We install new roofing systems, maintain existing roofing systems, and repair & replace built-up roofing systems. We have experience working on small commercial retail properties to high-rise buildings. No job is too big or too small. Contact Alpine Roofing Construction today for a roofing consultation.
Modified Bitumen Roofing Services
Modified Bitumen roofs are single-ply systems that are most often roll-applied to the roof surface. They are similar to asphalt roofs but they have additional polymers in their materials that provide added protection from the elements and help in increasing the lifespan of the product. Modified Bitumen Roofing Systems are commonplace and have a good reputation. Many times, Modified Bitumen roofs are installed by rolling out the roofing material after it has been heated with a blow torch. The heating process allows the material to adhere to the roof surface.
Advantages of a Mod Bit Roof
This material has high reflectivity ratings, meaning the surface of your roof stays cooler in the sun and the inside of your building stays cooler on hot summer days. It is typically a quick install and the system adheres very well to the roof surface because it is melted and bonded upon application.