Traditionally flat roofs would be the go-to style of roofing for commercial buildings, and just like the name suggests, the roofs themselves lay flat over the top building. When it comes to flat roofs, the most important thing to be aware of first is the fact that pretty much all of the roofing systems use what`s termed as Membrane Roofing. This only denotes that a material is used to move water from the roof.

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