Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot.
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For a mechanically attached residential pvc 50 mil membrane installed over a flat or low slope roof on a single.
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From there the flat roof system you choose will determine the materials you apply.
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The most common type used for residential flat roofing is epdm ethylene propylene diene monomer a synthetic rubber sheet material that is also commonly used as a pond liner.
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Cost installed per sq.
Plus it has the added advantage of reflecting heat from the sun which keeps energy costs down.
Plus polygal is lightweight and easy to install so you don t have to break your back or the bank to enjoy your clear plastic patio cover.
This can include epdm rubber and fibreglass talked about above but commonly especially in the trade and in this article it refers to pvc tpo tpe and pib.
For pricing and availability.
Metal is one of the most popular materials used for flat roof replacement.
In short any roof covering that can make a flat roof waterproof in one layer unlike roofing felt with its 3 layer system for instance.
Just enough slope to drain water but also flat enough to be a problem if not constructed properly.
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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.
Additionally pvc roofs are consistently chosen by homeowners looking to install an eco friendly green system over their flat or low slope roof.
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Metal specifically aluminum is known for its durability.
Expect to pay in the range of 6 50 to 12 50 per sq.
Polygal roof panels for pergolas are durable yet flexible so they can be utilized in curved applications.