How Do I Figure The Pitch Of A Roof

Here are a couple examples.

How do i figure the pitch of a roof. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Measure the rise of your roof. One method to find the pitch is to climb on the roof and measure the rise for a 12 run. Finally enter the value of the rafter length and.

Divide the results by the number of 12 inch segments in your level. 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. 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. Roof slope calculator example of use.

For example if the roof rises 4 feet and the span is 16 feet twice the run then the pitch is 4 16 or 1 4. First enter the value of the rise and choose the unit of measurement from the drop down menu. Here are the steps to follow for the roof angle calculator. Divide the slope by two to get the pitch.

You ll need a level that is 12 or longer and a tape measure. First measure 12 inches from one end of the level and make a mark. 8 inches and you have an 8 in 12 pitch. If this distance measures 4 inches you have a 4 in 12 pitch.

For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. You can also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler. Let s say it is equal to 1 5 m. 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.

Here s an easy safe way to determine the pitch from inside your attic. Pitch measurement method 1. For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. Let s assume it is equal to 6 m.

Then enter the value of the run and choose the unit of measurement from the drop down menu. If you do need to calculate the pitch an estimate or shortcut is usually more practical than measuring the roof s overall dimensions. Measure the run length it is the horizontal distance between the roof ridge and the wall of the building. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run.