How To Check Roof Pitch

Here s an easy safe way to determine the pitch from inside your attic.

How to check roof pitch.

Example a the measurements are taken from on top of the roof. A 12 12 pitch roof has a pitch angle of 45. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Simply mark a level at 12 hold it perfectly level and measure from the roof surface to your 12 mark this.

The 7 means that the roof rises 7 for every 12 it runs. Marvel at your mathematical. Find the inverse tangent of the pitch to find the angle in degrees. The term pitch has two different meanings when it comes to roofs.

First measure 12 inches from one end of the level and make a mark. 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 example to right shows 2 different ways to determine or calculate roof pitch also called roof slope. Divide the first part of the ratio by 12 to work out the pitch.

To convert between american roofing ratios and pitch degrees follow these steps. Check your results with the omni roof pitch calculator. 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. Most people use it to mean the steepness of the roof.