Flat Roof Membrane Detail

Also known as the built up roof bur this type of flat roof features three or more layers of waterproof material mixed in an alternating fashion with hot tar and a layer of smooth stone like gravel.

Flat roof membrane detail. As you might imagine this is the cheapest version possible and good for covering a shed. W it is the optimal choice for valleys and transition areas such as ridges rake edges and drip edges. Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot. There are three types of roofing systems used for rubber membrane roofs.

From there the flat roof system you choose will determine the materials you apply. Smooth tpo fleece back tpo self adhered tpo tpo colors extreme tpo. However their popularity does not mean it s the best type of roofing membrane but rather the. Based on the grace ice and water shield technology grace roof detail membrane is a flexible product that conforms tightly to common roof details such as skylights chimneys and dormer walls.

Roof membranes discussed in this article include built up asphalt tar and gravel modified bitumen and single ply membranes like epdm pvc tpo and kee. Available in 9 in. The materials on flat roofs are mostly rubber. Although tpo is a vinyl type of material we will also include it as part of this article.

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. We also cover spray applied foam and liquid roofing options. Just enough slope to drain water but also flat enough to be a problem if not constructed properly. Gaf tpo roofing membranes include.

Modified bitumen torch down roofing. Gaf analyzed membrane samples from roofs across the us and studied thickness over scrim surface cracking and the ability to repair aging tpo membranes. Common penetration details include soil vent pipes hot pipes from boiler flues or log burners electrical cables for air conditioning units extraction ducting and tracks for mechanical window cleaning systems. Epdm rubber membrane roofs are the most popular of all the membranes.

The rubbergard max epdm membrane is an internally reinforced cured single ply roofing membrane that is designed to combat roof tears and punctures and provides superior resistance to wind forces. Rubber membranes are part of most flat roofs.