Roof Pitch Slope Factor

The rise and the length.

Roof pitch slope factor.

Most commonly a roof pitch will be from 0 flat to 12 45. This calculator calculates the factor for a slope online. In construction the slope factor can be used to easily calculate the area of a roof. For tile shingle slate and metal roofing roof pitch is a term used in the roofing industry to describe the angle slope of a roofing structure.

The pitch of a roof is determined by 2 numbers. Roof pitch refers to the slope which the rafter creates. 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. 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.

For example if you measure 4 inches the pitch of your roof is 4 12. The slope factor works with metric and imperial measurements. 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. The roof slope factor chart also consists of conversion factors to determine the slope of the roof.

This will give you the rise over run or pitch. The headache of using pythagoras and trigonometry can be spared by making use of these charts. Often you express roof pitch as the ratio between the rise and the run in the form of x 12.