Pitch

The incline slope of a roof or the ratio of the total rise to the total width of a house, i.e., a 6-foot rise and 24-foot width is a one-fourth pitch roof. Roof slope is expressed in the inches of rise, per foot of horizontal run. (1) The slope of a roof or other plane surface.(2) Related to carpets, the number of tufts in a 27-inch width of carpet.