Roof Pitch Percentage

Roof is 6 12 pitch and measures at 2 400 square feet so 2400 x 1 12 2 688 2 88 sqs added for pitch.

Roof pitch percentage.

Divide the rise by the run and multiply by 100. 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. If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks. Enter the number 0 54167 in the following example and hit the atan button and then the button example.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Get your roof size by using this roof pitch calculator. A 12 in 12 pitch is a steep 45 degree angle roof. Low slope roofs are from 0 to 3 12 in pitch.

Some sources consider low slope to include 3 12 pitch roofs. For help converting any slope from one way of expressing it to another see roof slope expressed as rise. Sometimes pitch is also expressed in fraction form using a fraction with a slash such as 6 12. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

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. Pitch rise run 1 5 6 25. Recalculate this value into an angle. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m.

A roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Calculate the roof pitch as the proportion of rise and run. That s your roof pitch multiplier. For a 6 1 2 inch in 12 inch slope 6 1 2 6 5 arctan 6 5 divided by 12 arctan 0 54167 28 44 slope.

The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. Roof pitch refers to the slope which the rafter creates. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. Angle arctan pitch arctan 0 25 14.

For example if the roof pitch is 45 then sec 45 1 414213. Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Run degrees and percentage.

Finally you can find the roof pitch in the form of x 12. See the image below for more explanation on rise run and pitch.