Roofgenius.com Roof calculator, calculates a detail list of roof materials, and a complete estimate. Two ways to determine roof pitch. Offers tips and how to's on roofing. Roof Cutting Composition Shingles Cutting old composition shingles using an electric saw. Put an old saw blade in the saw with the blade teeth pointing backwards. Roof Cutting Composition Shingles Tips : Using a new blade will ruin the blade Best done when shingles are …
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