Roof Pitch Slope Factor

Roof area in square metres length in metres width in metres slope factor.

Roof pitch slope factor.

This calculator calculates the factor for a slope online. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Roof pitch refers to the slope which the rafter creates. The rise and the length.

The pitch of a roof is determined by 2 numbers. 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. 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 construction the slope factor can be used to easily calculate the area of a roof.

A 10 slope roof should not be confused with a 10 pitch roof as a 10 slope roof means that the roof rises by ten inches for every foot of run. For example if you measure 4 inches the pitch of your roof is 4 12. 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. The headache of using pythagoras and trigonometry can be spared by making use of these charts.

The slope factor works with metric and imperial measurements. This will give you the rise over run or pitch. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter.