Roofing is hazardous work for the homeowner, and DIYers may lack the expertise to identify hidden damage, leaks, or structural problems. Installing new shingles over existing shingles in good condition is called re-roofing. If your roof is nearing the end of its lifespan but the sheathing board and underlying elements are still in good condition, your roof could be a candidate for re-roofing. Warranties should be offered on the materials used, as well as on the installation and labor.

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