How Do I Figure The Pitch Of A Roof

You can also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler.

How do i figure the pitch of a roof. Pitch measurement method 1. Measure the rise of your roof. Here are the steps to follow for the roof angle calculator. Divide the slope by two to get the pitch.

First enter the value of the rise and choose the unit of measurement from the drop down menu. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Let s assume it is equal to 6 m. On the roof hold the level perfectly level and measure the height from the roof to the level 12 inches away from where the level touches the surface this will be the rise.

8 inches and you have an 8 in 12 pitch. Here are a couple examples. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Then enter the value of the run and choose the unit of measurement from the drop down menu.

For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. First measure 12 inches from one end of the level and make a mark. Measure the run length it is the horizontal distance between the roof ridge and the wall of the building.

On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. Divide the results by the number of 12 inch segments in your level. You ll need a level that is 12 or longer and a tape measure. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

If you do need to calculate the pitch an estimate or shortcut is usually more practical than measuring the roof s overall dimensions. If this distance measures 4 inches you have a 4 in 12 pitch. Let s say it is equal to 1 5 m. Here s an easy safe way to determine the pitch from inside your attic.

Finally enter the value of the rafter length and. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. Roof slope calculator example of use. One method to find the pitch is to climb on the roof and measure the rise for a 12 run.