Bitumen Flat Roof Construction

While the lifespan is less than the more advanced options the price point alone can make modified bitumen one of the best flat roof materials for some businesses.

Bitumen flat roof construction.

The felts are reinforced with either glass fiber mats or organic mats ply sheets and when joined with the bitumen form a durable roofing membrane. Materials such as layers of fiberglass or polyester are added to the asphalt to add strength to a flat roof. If you know you need a commercial roof replacement we re the team to trust. Bitumen roof advantages and disadvantages.

Video of the day volume 0. 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. At one time built up roofs burs once represented half of all flat roof coverings. Modified bitumen is a type of asphalt product that can be applied in a number of ways to the roof in both hot and cold temperatures.

From there the flat roof system you choose will determine the materials you apply. Today modified bitumen mb is king with cap membranes torched on to fuse them to fiberglass reinforced interplies or base coats. Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. Pros and cons for flat roof materials.

What are the different types of flat roofs. Modified bitumen roofing is a roofing asphalt. Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules. Popular in north america for more than 100 years built up roofing bur systems are composed of alternating layers of bitumen asphalt and fabrics called roofing felts.

Burs consisted of alternative layers of heavy building paper and hot tar. 4 5 7 per sq. Modified bitumen and rolled asphalt roofs. You can use our flat roof calculator to quickly and accurately estimate the cost of replacement.

The hot applied asphalt or coal tar pitch blends with the bitumen soaked roof felt and creates a monolithic roof membrane. One of the longer lasting roofing options for flat roofs is bitumen roofing or a modified bitumen roof. Modified bitumen roofs have a lot of advantages over other types of membrane roofing and are often seen as the modern alternative to the built up roof. Built up roof bur modified bitumen roof mbr and rubber membrane roof epdm.

5 50 6 50 per sq. All three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof.