The Advantages And Disadvantages of Including a Layer of Roofing Shingles

Homeowners commonly wonder whether it's economical to include one more layer of roof shingles instead than tearing off the old ones. Positioning a 2nd layer catches moisture, which can significantly decrease the lifespan of the shingles, inevitably costing much more in the long run. While including an additional layer might show up cheaper upfront, the possible damage and the lowered roof life might make it much less of a deal than it seems.

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