Winter’s finally given the rooftops their first dusting of snow. But if every falling flake made you wonder whether your roof would survive another season, it’s time to consider these points, brought to you with help from the Department of Energy and roofing-material manufacturers. You need to know which kind of roof you have — flat, sloped or peaked — and what weight it will bear. This will determine the most appropriate roofing material. (Asphalt shingles aren’t right for a flat roof, for example).

Metal roofs, common long ago, are making a comeback — in steel, aluminum and copper, among other types. To reduce the corrosion rate, steel is galvanized with a zinc or zinc/aluminum coating. Metal is available as traditional seam-and-batten roofing, tiles, shingles and shakes. New metal roofs last two to three times longer than asphalt. Wood shakes look different on every roof. But in addition to a distinctive appearance, they can help insulate your attic and allow your house to breathe, circulating air through small openings under the felt rows on which the wooden shingles are laid. Traditional roofing tiles are made from clay. They are durable and low-maintenance, save energy and are environmentally friendly. Because the longevity of a tile roof also depends on the quality of the subroof, manufacturers are working to improve flashings and other aspects of the underlayment system.

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