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You just have to measure it. Height times width and double that for simple roofs. Lots of angles or dormers will have to be allowed for. 3 bundles in a square. 1 square covers 100 square feet. Height times width gives you the square footage and do the math.

Assuming you are talking about asphalt shingles they can be up to 5 bundles per square if you are using dimensional shingles. the standard flat three tab shingles are 3 bundles per square. You can calculate roof area just based on the dimensions taken on the flat. There are different multipliers to use that depend on the pitch of your roof.

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13y ago

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