How Do You Measure The Pitch Of A Roof

Measure the rise of your roof.

How do you measure the pitch of a roof.

Then enter the value of the run and choose the unit of measurement from the drop down menu. 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. Roof pitches are measured by their riseand run. 8 inches and you have an 8 in 12 pitch.

You ll need a level that is 12 or longer and a tape measure. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Finally enter the value of the rafter length and.

One method to find the pitch is to climb on the roof and measure the rise for a 12 run. If you do need to calculate the pitch an estimate or shortcut is usually more practical than measuring the roof s overall dimensions. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. 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.

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. Here s an easy safe way to determine the pitch from inside your attic. 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. A roof s pitch is the rise for every 12 inches it runs.

Pitch measurement method 1 1. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. The rise is the vertical length from the top of a stud wall to the peak of the roof. Divide the slope by two to get the pitch.

Here are a couple examples. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. The run is the horizontal length from the outside edge of a perimeter stud wall to the center of the house. Let s assume it is equal to 6 m.

If this distance measures 4 inches you have a 4 in 12 pitch. Let s say it is equal to 1 5 m. Roof slope calculator example of use. Measure the run length it is the horizontal distance between the roof ridge and the wall of the building.

First enter the value of the rise and choose the unit of measurement from the drop down menu.