Home » DIY FAQs » Building Materials » Siding & Roofing » Asphalt Roofing » Can I just lay down the new shingles over the old ones?

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You can put asphalt shingles over an existing roof. However, if there is more than three layers of old roofing on the structure, they must be removed completely before applying new shingles.
 

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DIY Encyclopedia

  1. Three-Dimensional Asphalt Shingle
  2. Roll Roofing
  3. Metal Roofing
  4. Fiberglass Asphalt Shingle
  5. Roofing Shovel
  6. Wood Shingle
 

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