A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by the area covered by a sloped roof to produce the area of the actual surface of the roof.
Roof pitch conversion factor.
For roof slopes expressed as x in 12 rise in run the roof pitch multiplier is determined by finding the square root of rise run 1.
In essence a roof pitch chart is provided as a rough guide usually by a roofing company.
Roof pitch refers to the slope which the rafter creates.
It is sometimes called the roof pitch multiplier.
Often you express roof pitch as the ratio between the rise and the run in the form of x 12.
Roof pitch and corresponding angles.
This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.
You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof.