The Advantages And Disadvantages of Including a Layer of Roofing Shingles

Homeowners usually wonder whether it's economical to include an additional layer of shingles instead than tearing off the old ones. Positioning a 2nd layer traps moisture, which can dramatically decrease the life-span of the tiles, eventually costing much more in the long run. While including one more layer might show up more affordable upfront, the possible damage and the lowered roof covering life might make it much less of a bargain than it seems.

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