Roofing Pitch Factor

Calculate the roof pitch as the proportion of rise and run.

Roofing pitch factor.

The roof pitch conversion factor is a number that when multiplied by the area covered by the roof gives an estimate the total surface area of the sloped roof itself. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.

Pitch is expressed as a ratio of the vertical rise to the horizontal span. 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. See the image below for more explanation on rise run and pitch. The whole table of roof pitch and slope gives a conversion factor so as to obtain a numerical figure of the slope.

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. In order to know what type of materials will work best for your project and the amount of materials required you ll need to find out the pitch of your roof. Measure the rise of your roof. Often you express roof pitch as the ratio between the rise and the run in the form of x 12.

When outfitting your residential or commercial structure with roofing materials from everlast roofing inc it s important to know the incline or pitch of your roof. Therefore your slope factor for a 6 12 pitch roof is 1 118. One medium to describe the roof pitch is in 12 runs. On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length.

Roof pitch factor calculator if you have already decided that you are going to have pitched roof on your house then you have made a nice decision. Calculate the rafter length substituting these values into the following formula. Let s say it is equal to 1 5 m. 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 and corresponding angles. Factor charts you could calculate the slope factor for every single roof pitch but as a public service many roofing companies provide slope factor charts. Roof pitch refers to the slope which the rafter creates. Pitched roof provide you protection again heavy rains.

It is sometimes called the roof pitch multiplier. There are lots of advantages that you can get by having pitched roof on your house as compare to flat roof. Pitch rise run 1 5 6 25. A 12 in 12 pitch is a steep 45 degree angle roof.