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.
New flat roofing systems.
Membrane roofing consists of a layer of insulation board topped by sheets the membrane of epdm rubber or other material.
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.
This flat roofing dominates the market because it s affordable and strong.
Compared to older roofing systems epdm weighs lighter.
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These panels generally come with a painted mill finish or a clear acrylic finish.
Roofing contractors can install epdm using different methods.
This lightness eliminates the need for owners to use reinforcement for their roof decks.
Low slope structural metal roofing is commonly known as standing seam roofing and consists of interlocking panels that run vertically along the roof surface.
Modified bitumen an asphalt based multi ply flat roofing system is considered a modern take on its close cousin bur or built up roof.
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Modified bitumen is installed in multiple layers multi ply roof each of which is torched to the surface below at every turn of the roll.
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New metal roof system applications.
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.