How Do I Figure Out The Pitch Of My Roof

Often you express roof pitch as the ratio between the rise and the run in the form of x 12.

How do i figure out the pitch of my roof.

Roof pitch is often expressed as a ratio between rise and run in the form of x 12. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. First measure 12 inches from one end of the level and make a mark. Roof pitch refers to the slope which the rafter creates.

Roof pitch is simply the slopecreated by the rafter. It is often compared to slope but is not exactly the same. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

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. Divide the slope by two to get the pitch. Here s an easy safe way to determine the pitch from inside your attic. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.

For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. Here are a couple examples. 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.