Metal Roofing Benefits Expected life: Properly installed, a metal roof should last as long as the house, sealing out water, surviving high winds, and easily shedding snow. Metal is resistant to fire, mildew, insects, and rot. Speed & ease of roofing installation: An accomplished contractor can install these quickly. If your roof is stripped off and a storm is on the way, shortening the process by a day or two may offer a critical advantage. Obviously, there is also considerable labor savings if you can ease and shorten the duration of roof installation. Fire resistance: Because metal roof materials are noncombustible, they typically have a Class A fire rating (the most fire-resistant rating). Just be aware that part of a roof’s overall classification depends on materials beneath the surface that could ignite in intense heat, too. Most metal roofs applied over a combustible material such as wood shingles have a lower, Class C rating for this reason. See notes under “Metal Roofing Drawbacks” regarding problems in the event of a house fire. Heat conduction: Metal reflects radiant heat from the sun, minimising midday heat gain. This means you save energy needed for air conditioning during the day. Though the material itself is low in insulation R-value, metal roofing can be applied over rigid-foam insulation that has very high R-values. In addition, many systems utilise a dead-air space between the metal and roof deck to increase energy efficiency. PPGI ROOFING SHEET SUPPLIER IN INDORE! PROFILE SHEET SUPPLIER IN INDORE! GALVANISED SHEET SUPPLIER IN INDORE! 4.25Ft EXTRA LARGE PROFILE SHEET!