How To Determine Roof Pitch Needed

If you do need to calculate the pitch an estimate or shortcut is usually more practical than measuring the roof s overall dimensions.

How to determine roof pitch needed.

How to calculate the pitch of a roof method one. Take a measurement of 12 inches using a level. One method to find the pitch is to climb on the roof and measure the rise for a 12. Roof pitch is often expressed as a ratio between rise and run in the form of x 12.

Measure from the attic. The run always remains. Check the surface of the. Here are a couple examples.

Measure from the roof. The tools required will be a contractor s level at least 24 inches long 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. Divide the slope by two to get the pitch.

Position your level against the roof until the bubble of the vial sits between two lines. Before taking any measurements you must first confirm that it s safe to walk on your roof. Roof pitch is measured by rise run rise the distance from the top of a stud wall to the peak of the roof. It can be assessed in two ways either as the angle the rafter makes with the horizontal or the proportion between the rise and the run of the roof.

Measuring a roof pitch ideally you will have safe access to your roof from inside the building. Run the distance from the outside edge of a perimeter stud wall to the center of the house. Roof pitch is simply the slopecreated by the rafter.