Roof Pitch Slope Factor

The pitch of a roof is determined by 2 numbers.

Roof pitch slope factor.

The rise and the length. 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. For example if you measure 4 inches the pitch of your roof is 4 12.

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. Roof area in square metres length in metres width in metres slope factor. Often you express roof pitch as the ratio between the rise and the run in the form of x 12.

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. 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. 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. This calculator calculates the factor for a slope online.

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. The slope factor works with metric and imperial measurements.