![]() ![]() This material also seals around each fastener penetrating the roof.Īllow the metal to move Slip sheets, typically rosin paper, laid between the roofing and the underlayment, allow the metal to expand and contract freely, and protect the integrity of the underlayment. Water will get past metal joints the best way to stop it is with a high-temperature, waterproofing underlayment stuck to the entire roof deck. Shown: An electric seamer crimps panel edges for a tight, no-leak joint. Up ahead: a look at materials and styles to consider, plus how to get the job done right, so your house will stay cool and dry for decades to come. And while it commands a premium-the components are expensive, as is the skilled labor for installation-a metal roof can boost a home’s resale value by up to 6 percent in some areas. Today, metal roofing is on the rise again: Its popularity has nearly quadrupled in the last 20 years. By the 1920s, lightweight, no-rust aluminum entered the market, as did paint coatings that added color and longevity to both aluminum and steel roofs. ![]() By the mid-1800s, metal roofing became more common as mass-produced steel began covering ordinary homes and barns. In America, copper and lead roofs appeared on important public buildings beginning in the 18th century, including New York’s City Hall in 1764. And properly installed, they need virtually no upkeep. They can save energy, thanks to their ability to reflect the sun’s heat. They’re durable, enjoying a life span of up to 50 years or more. They’re strong, able to survive hurricanes, hail, and wildfires. The advantages of metal roofs are tough to ignore. ![]()
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