Versatile metal roofs provide protection for virtually every type of building, from shopping centers to schools, churches to libraries, skyscrapers to homes. In new construction, metal roofs are used in approximately 50 percent of all low-rise commercial, industrial and institutional buildings erected during the last several years.
Cool metal roofing and wall products help reduce building energy consumption by lowering cooling loads. Reflective metal roofs can save up to 40 percent in building cooling energy costs and are excellent options for commercial retrofit applications. Metal roofing can be efficiently installed with above sheathing ventilation (ASV) in many retrofit applications, which allows heat to dissipate through the ridge vent in hot weather while acting as an insulating layer when it is cold. With ASV, steel roofs can contribute to a 30 percent reduction in heat gain through the roof.
Steel roofing and siding offers an excellent base to provide a building with electrical generation and innovative solar thermal systems. Metal roofs provide the optimal foundation for photovoltaic installations, since the roof can be expected to last longer than the PV system it supports. New technologies are being developed that allow the PV generating system to be painted directly on the metal roofing substrate. Wall and roof solar heat recovery systems can be integrated with steel cladding and used to provide air, water, or process heating needs.
In addition to these direct energy-saving benefits, steel roofing and wall cladding contribute to an overall reduction in environmental impact. Steel construction materials in retrofit applications typically generate credits in green building certification programs and reduce the building's carbon footprint. Steel cladding is durable, offering long-term resistance to weather, including wind, hail, ice and snow. Commercial metal roofs have been in service in excess of 30 years, and painted metal roofs are credibly warranted for a minimum of 30 years. Steel is produced using recycled materials and is fully recyclable at the end of its useful life. Reflective metal roofs can help reduce urban heat island effect. As an added benefit, steel roofing is lightweight, so a retrofit steel system can often be installed over an existing roof covering, reducing landfill waste.
In the residential market, homeowners rely on metal roofs for their durability and resistance to fire, wind, fire and insects. White-painted metal roofing can save homeowners up to 40 percent of their annual energy bills. Metal roofing can last as long as 50 years or more and requires little maintenance.
SMDI works in partnership with and the Cool Metal Roofing Coalition and the Metal Construction Association to promote the sustainable benefits of metal roofing in commercial construction, and in partnership with the Metal Roofing Alliance to bring the benefits of metal roofing to residential construction.
A sustainable retrofit of residential roofs is now possible with PV-PCM roofs. Read about the new technology.
Cool metal roofs are energy-efficient, cost-effective, and look great! Get the facts!