Roof Pitch Slope Factor

The headache of using pythagoras and trigonometry can be spared by making use of these charts.

Roof pitch slope factor.

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. In construction the slope factor can be used to easily calculate the area of a roof. For example if you measure 4 inches the pitch of your roof is 4 12. 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 refers to the slope which the rafter creates. 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. 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.

The roof slope factor chart also consists of conversion factors to determine the slope of the roof. 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. The pitch of a roof is determined by 2 numbers. This will give you the rise over run or pitch.

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. The slope factor works with metric and imperial measurements.