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METAL ROOFING
A metal roof is a roofing system made from metal pieces, or tiles. Metal roofs protect buildings. Advantages: Very durable in cold weather High percentage of recycled material and are 100% recyclable Metal roofing can be used for residential and commercial buildings. The same material used for metal roofs can be used for siding as well. Metal roofing can also be applied over an existing roof. Roofing materials made from stainless steel, zinc or copper will rarely require maintenance over their lifetime. These materials commonly last over a century. To wash a metal roof, using water with a hose or power washer is sufficient; for more resistant dirt, a brush with detergent or trisodium phosphate is effective. Abrasive cleaners and tools such as wire brushes and steel wool, however, may damage the protective coating on a metal roof.
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FRAMING
Roofs are usually built to provide a sloping surface intended to shed rain or snow, with slopes ranging from 1 cm of rise per 15 cm (less than an inch per linear foot) of rafter run (horizontal span), to steep slopes of more than 2 cm per cm (two feet per foot) of rafter run. A light-frame structure built mostly inside sloping walls comprising a roof is called an A-frame. Light-frame methods allow easy construction of unique roof designs; hip roofs, valleys, dormers, gables, clerestories.
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FLAT ROOF. TPO/EPDM
A flat roof is a roof which is almost level in contrast to the many types of sloped roofs. The slope of a roof is properly known as its pitch and flat roofs have up to approximately 10°. EPDM: is a synthetic rubber most commonly used in single-ply roofing because it is readily available and simple to apply. Seaming and detailing has evolved over the years and is fast, simple and reliable with many membranes including factory applied tape, resulting in a faster installation. The addition of these tapes has reduced labor by as much as 75%. TPO: Thermoplastic Polyolefin 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. When this technique is properly applied, in appropriate places, its warranted life-span has reached 30 years and its expected lifespan has reached 50 years.
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SHINGLES SLOPE ROOF
Roof shingles are a roof covering consisting of individual overlapping elements. These elements are typically flat, rectangular shapes laid in courses from the bottom edge of the roof up, with each successive course overlapping the joints below. Shingles are made of various materials such as wood, slate, flagstone, fiber cement, metal, plastic, and composite material such as asphalt shingles. Roof shingles are a very common roofing material. Roof shingles are almost always highly visible and so are an important aspect of a building's aesthetics in patterns, textures and colors. The type of shingle is taken into account before construction because the material affects the roof pitch and construction method.
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