Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. This roofing calculator will work on any device with web access and is designed to replace the unwieldy hard copy look up tables. Once you have the raw number of roofing squares along with other items on your roof diagram eaves rakes ridges hips valleys roof slope simply enter them in and roof bid helper will do the hard work of finding your total number of squares.
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