metal roofing on existing roof: "is it okay to put a metal roof on top ..." - Guest User (8/16/2004) | Roofing over existing roof | Archive

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is it okay to put a metal roof on top of an existing 1 layer shingled roof? or will it be too heavy?		Guest User 8/16/2004	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/3735/find/
Metal roofing is very low weight -- ranging from about 45 pounds per square for aluminum to 85 - 145 for steel. Asphalt shingles, on the other hand, weigh from 275 - 425. Most building codes allow for two layers of roofing but you should double check yours. Metal is frequently used as a second layer. many of the residential products are designed specifically for re-roofing.		Guest User 8/16/2004	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/3736/find/