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Roof pitch
Measure of roof steepness / From Wikipedia, the free encyclopedia
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Roof pitch is the steepness of a roof expressed as a ratio of inch(es) rise per horizontal foot (or their metric equivalent), or as the angle in degrees its surface deviates from the horizontal. A flat roof has a pitch of zero in either instance; all other roofs are pitched.
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![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/6/65/Pitch_gauge_measuring_slope_on_a_roof.jpg/640px-Pitch_gauge_measuring_slope_on_a_roof.jpg)
A roof that rises 3 inches per foot, for example, would be described as having a pitch of 3 (or “3 in 12”).