How To Figure Out Your Roof Pitch

Roof pitch refers to the slope which the rafter creates.

How to figure out your roof pitch.

One method to find the pitch is to climb on the roof and measure the rise for a 12 run. You ll need a level that is 12 or longer and a tape measure. Divide the slope by two to get the pitch. Angle arctan pitch arctan 0 354 19 5 a n g l e a r c t a n p i t c h a r c t a n 0 354 19 5.

You can also calculate the pitch angle. Calculate the rafter length substituting these values into the following formula. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly 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.

Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Pitch measurement method 1. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. 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 rise of your roof. 8 inches and you have an 8 in 12 pitch. Roof pitch calculator results explained slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run. 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.

If you want to know how to find the pitch of a roof then start with a calculator. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Let s say it is equal to 1 5 m. 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 this distance measures 4 inches you have a 4 in 12 pitch. Pitch rise run 1 5 6 25. This will allow your project to carry the depth and detail in the roof that you wanted as well as make sure that it will maintain a sturdy and effective nature throughout. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.

Calculate the roof pitch as the proportion of rise and run. Here are a couple examples. Even if you want to use a flat roof pitch calculator system you will be able to find one. And lastly calculate the grade.

Grade 100 pitch 100 354 35 4 g r a d e 100 p i t c h 100 354 35 4.