Thermoplastic polyolefin (TPO) roofing is a single-ply roofing application. TPO is one of the fastest growing commercial roofing applications being used today and has gained broad industry acceptance due to the many performance and installation advantages. Used on flat roofs (as opposed to sloped roofs), TPO roofing is a single-ply roofing. This roofing material can be fully adhered, mechanically fastened, or ballasted. TPO seam strengths are reported to be three to four times higher than EPDM roofing systems. This is a popular choice for “Green” building as there are no plasticizers added and TPO does not degrade under UV radiation.
It is available in white, grey, and black. Using white roof material helps reduce the “heat island effect” and solar heat gain in the building.
A metal roof is a roofing system made from metal pieces or tiles. Materials used for metal roofs vary and include steel, stainless steel, copper, tin, aluminum and even lead. Each type has various methods or usages. The type of metal chosen should be consistent with many factors, including weather, exposure, roof type (pitch) and cost. Metals can often be blended to make up different grades and strengths.
Metal roofs are common in commercial roofing. Not only are they strong, they also have an aesthetic appeal. For instance, copper has a history if use in architecture for thousands of years, including being the chosen style for the Pantheon in 27 BC.
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