Asphalt Flat Roofing Details

This is a hazardous job best left to professionals.

Asphalt flat roofing details.

The pour and. Going back about 120 years the grandfather of flat roofs is the built up roof or bur. Absorbent or dusty surfaces should first be primed with a suitable proprietary roof primer. Commonly used for commercial roofing jobs the asphalt is melted poured and spread while hot.

Upstands are most at risk as the asphalt can slump in the heat problems. The tar that is used comes in cold solid blocks of coal tar. However over the last few decades new and advanced materials have been developed. This flat roofing material is popular because it uses trusted weatherproofing materials asphalt reinforced with polymers.

The saturated asphalt paper is also called a felt or ply sheet. A classic flat roof is either almost completely level or has a very slight pitch of 3 in 12 inches or less. Flat roof felts are bitumen impregnated sheets which are applied in layers. Built up roofs have solved the low pitch roof problem for ages a challenge that asphalt shingles could never handle.

Protective chippings may need to be respread. So in this story i m going to focus on details for membrane roofing and in particular tpo thermoplastic polyolefin membranes. The asphalt is heated in a kettle with propane gas and then pumped up to the work on the roof. Asphalt roofing systems that really resist structural and thermal movement even in temperatures below 0.

For flat roofs slope less than 2 12 you should not be installing roll roofing but rather you should use a flat roof system such as app or sbs modified roofing or epdm rubber roofing see details for flat roofs. Asphalt metal and timber decks although the manufacturer s details should be checked to ensure compatibility. Asphalt flat roof john gilbert the white reflective coating has faded. Sbs or modified asphalt mineral surfaced roll roofing membranes are based on sbs a synthetic rubber that gives improved performance over traditional asphalt saturated felt.

Asphalt needs a reflective covering to stop heating and cooling which leads to cracking. These roofing felts are reinforced with fiberglass matting. Most flat roofs are typically not as long lasting or durable as sloped ones because the latter shed snow and rain a lot quicker. It has the advantage of multiple layers but needs fewer layers than built up roofing and is less messy to apply.

They are available as either self adhesive sheets or bonded together with hot or cold bitumen. Traditional pour and roll method of bituminous flat roofing. Firestone provides a wide range of accessories and installation tools in addition to high quality built up membranes suitable for almost any flat or low slope roof condition.