Roof Pitch Slope 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.

Roof pitch slope factor. The rise and the length. 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. 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.

In construction the slope factor can be used to easily calculate the area of a roof. The slope factor works with metric and imperial measurements. This calculator calculates the factor for a slope online. Roof area in square metres length in metres width in metres slope factor.

Most commonly a roof pitch will be from 0 flat to 12 45. 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. 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.

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. 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. Often you express roof pitch as the ratio between the rise and the run in the form of x 12.