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January 30, 2015

January 30, 2015

Posted by **Roofer** on Tuesday, March 12, 2013 at 6:20pm.

- job related -
**MathMate**, Tuesday, March 12, 2013 at 6:28pmIf the slope is 9 inches per foot (run), then the roof is 15" per foot run.

I suppose rake factor is the ratio of roof length to rise, which works out to 1.25 in this case.

The roof area (for one sloping face) is therefore

(15"/9")*10'*30' long

= 500 sq. ft.

If the roof has another sloping face, then double the above.

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