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EmailFour IIBHS standards boost storm resiliency for roofs
Existing roofs can be strengthened with two-part, closed-cell polyurethane foam
Hurricane Standards from the Insurance Institute for Business and Home Safety can help make roofs resilient in storms. Existing roofs can be strengthened with a two-part, closed-cell polyurethane foam that can be installed under each rafter or truss. When replacing the roof, the existing shingles should be removed and the new roof deck should be a minimum of 7/16-inch plywood or OSB, and be attached with 8d shank nails spaced nominally at 6 inches on center.
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