Asphalt Flat Roof Covering

Burs consisted of alternative layers of heavy building paper and hot tar.

Asphalt flat roof covering.

The roof felt asphalt tar layering is repeated in overlapping layers until the assembly is two to fours plies in thickness. Owens corning deckseal sa sbs cap 39 375 ft w x 32 833 ft l 100 sq ft shasta white roll roofing. Twin home experts review on sure coat white reflective coating system for flat roofs. It consists of multiple layers of tarpaper rolled in asphalt and applied to the roof.

At one time built up roofs burs once represented half of all flat roof coverings. Built up roofs are manufactured using built up layers of either tar saturated paper and liquid tar with gravel asphalt rolled asphalt or modified bitumen. Flat roof covering membranes on greenspec. Modified bitumen roofs use an asphalt membrane as the base of the roof itself.

This surface is susceptible to cracking and blistering which reduces the typical lifespan to just 10 to 15 years. We ve also shared a few steps on how to apply it to your own roof. Asphalt is heated in an asphalt boiler and laid while still hot onto the roof trowelled into shape and cools to form a very hard durable roof. Data and information is provided for information purposes only and is not intended for trading purposes.

A wear surface of finely crushed stone granules is usually applied to the top layer of hot tar to protect the built up roof assembly from uv light and weather. Tar and gravel 2. As the roof is installed more and more layers are added to increase durability and longevity hence the name built up. There are many different types of flat roof coverings mineral felt torch on felt mastic asphalt grp and fibreglass pvc single ply membrane tpo single ply membrane thermoplastic polyolefin and epdm single ply membrane elastometric membranes.

As we will see below the epdm rubber roof has largely emerged as the flat roof of choice due to its ease of installation and relatively low cost. There are many different types of flat roof coverings here s a breakdown of them. But flat roof is a convenient term for a class of multimembrane systems with very shallow pitches. Greenspec accepts no responsibility or liability for any damages or costs of any type arising out of or in any way connected with your use of this web site.

I ve seen and worked on many asphalt roofs that are at least 40 years old.