How To Check Roof Pitch

Marvel at your mathematical.

How to check roof pitch.

This is the amount your roof inclines in a 1 foot span or the pitch of your roof. The example to right shows 2 different ways to determine or calculate roof pitch also called roof slope. The 7 means that the roof rises 7 for every 12 it runs. First measure 12 inches from one end of the level and make a mark.

Place the end of your level the 0 inch point of your 12 marking against the roof surface. Some carpenters consider it more correct to use the term slope for the steepness and use pitch to describe the roof s overall dimensions. The term pitch has two different meanings when it comes to roofs. A 12 12 pitch roof has a pitch angle of 45.

Example a the measurements are taken from on top of the roof. Check your results with the omni roof pitch calculator. To convert between american roofing ratios and pitch degrees follow these steps. Hold the level straight and level bubble centered and then measure the vertical distance down from the your 12 mark on the level down to the roof.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Divide the first part of the ratio by 12 to work out the pitch. Here s an easy safe way to determine the pitch from inside your attic. Find the inverse tangent of the pitch to find the angle in degrees.