Bitumen Asphalt Flat Roof

Bitumen roofs are one of the longer lasting types of flat roofing materials easily lasting 20 years or more.

Bitumen asphalt flat roof. Modified bitumen roofs use an asphalt membrane as the base of the roof itself. Modified bitumen is installed in multiple layers multi ply roof each of which is torched to the surface below at every turn of the roll. Asphalt flat roof construction repair and replacement with an epdm rubber roofing membrane. The good news is a longer lasting roofing material has a lower environmental impact.

They have a proven track record that can be counted on. Built up roofs are installed using several layers of a special type of roofing felt that has been asphalt impregnated and embedded in bitumen applied with a hot mop. This surface is susceptible to cracking and blistering which reduces the typical lifespan to just 10 to 15 years. Regardless of how the material is applied self adhesive sheets hot mopped asphalt or cold applied adhesives the seams are usually melted together which help stop leaks.

Firestone asphalt roofing delivers exceptional performance on flat and low slope commercial roofs in even the most extreme climates and applications. Bitumen roofs have been around for a long time. Modified bitumen an asphalt based multi ply flat roofing system is considered a modern take on its close cousin bur or built up roof. Traditionally most flat roofs in the western world make use of tar or asphalt more usually felt paper applied over roof decking to keep a building watertight.

Modified bitumen roof when compared to other commercial roofing materials modified bitumen stands out as the more budget friendly option. It cannot be bonded to uneven surfaces such as shingles as this hinders the membrane from successfully bonding onto the surface. The felt paper is in turn covered with a flood coat of bitumen asphalt or tar and then gravel to keep the sun s heat uv rays and weather off it and helps protect it from cracking or. An epdm rubber roof can be bonded to asphalt but this depends on the rubber membrane system you are using.

The hot applied asphalt or coal tar pitch blends with the bitumen soaked roof felt and creates a monolithic roof membrane. Firestone building products manufactures traditional built up systems modified bitumen membrane systems hybrid built up and modified bitumen systems. The bitumen used in flat roofing is a by product of refining crude oil for use as petrol diesel and gas. It has the advantage of multiple layers but needs fewer layers than built up roofing and is less messy to apply.

Materials such as layers of fiberglass or polyester are added to the asphalt to add strength to a flat roof.