How To Figure Out Your Roof Pitch

For example if a roof has a pitch of 4 12 then for every 12 inches the building extends horizontally it rises 4 inches.

How to figure out your roof 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. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. 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. 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.

Generally roof pitch is calculated from the same formula that describes a right triangle. 8 inches and you have an 8 in 12 pitch. 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.

Roof pitch refers to the slope which the rafter creates. How to calculate roof pitch. If you want to know how to find the pitch of a roof then start with a calculator. Here are a couple examples.

One method to find the pitch is to climb on the roof and measure the rise for a 12 run. Rise run pitch where pitch is expressed in percent. The roof pitch is the slope of the rafter. The rise is the height of the roof and the run is the horizontal span as pictured above.

You can use the following equations to find the length of the rafter and the slope. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. You ll need a level that is 12 or longer and a tape measure. Divide the slope by two to get the pitch.

Rafter rise run from the pythagorean theorem. 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. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.

Even if you want to use a flat roof pitch calculator system you will be able to find one. Pitch measurement method 1. 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.