Pitch Of A Roof Math

Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.

Pitch of a roof math. Most people interested in roof pitch are actually measuring the slope which is the most useful measurement when considering roofing material and rainwater. Add 2 feet of overhang and the total would be a rafter that is 14 66 feet long. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof.

The roof is a triangle that can be broken down into ratios. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. Roof pitch is used to describe the slope or angle of the roof. No just plain old mathematics.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. For instance a 4 12 pitch roof with a 12 foot run would be 12 x 1 055 which equals 12 66 feet. Here is a list of common rafter lengths for common pitches.

Even carpenters often use the terms slope and pitch.