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Footprint length
ft
m
Footprint width
ft
m
Roof pitch (rise per 12)
1/12
2/12
3/12
4/12
5/12
6/12
7/12
8/12
9/12
10/12
11/12
12/12
A 6/12 roof rises 6 in for every 12 in of run
Waste allowance
%
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Result
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