What Ply To Use On A Flat Roof

The industry offers a thickness of anywhere from 5 16 inch to inch.

What ply to use on a flat roof.

Osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof design. Common flat 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. The membrane roof is the latest roofing technology and is also the roof of choice in commercial construction. Membrane roofing is often used on commercial flat roofs.

Look for something that s graded as exposure 1 or exterior. Roofing can also be improved by using extra insulation and fresh single ply membranes the effects of an extra insulation will be experienced by the cooler temperatures that will be enjoyed in the interior during the summer and the use of the single ply will definitely prolong the life span of the roof. In addition to the thickness you also need to make sure that you choose plywood that s graded for outdoor use. Tpo is 1 70 per sq foot.

We also cover spray applied foam and liquid roofing options. Known technically as elastomeric or plastomeric roof membrane depending on the material single ply roofs come in a few different varieties including. Pros and cons for flat roof materials. Rafters run from the peak of the roof.

In roofing plywood is often selected due to its strength. Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component. Single ply roofing has become an increasingly popular flat roof covering over the last few years. Pvc is 1 90 per sq foot.

You can use our flat roof calculator to quickly and accurately estimate the cost of replacement. What plywood should you use for a roof. What size plywood should you use for your roof. In general materials used on flat roofs cost less than ones used on sloped ones.

The minimum plywood for roofing. Why is plywood used in roofing. 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. Epdm is 1 50 per sq foot making it the cheapest single ply membrane.

It is formed from multiple layers of wood bonded together with a glue and the grains run in alternate directions through each layer which ensures the board s strength is.