How To Check Roof Pitch

Divide the first part of the ratio by 12 to work out the pitch.

How to check roof pitch.

Find the inverse tangent of the pitch to find the angle in degrees. A 12 12 pitch roof has a pitch angle of 45. Check your results with the omni roof pitch calculator. Place the end of your level the 0 inch point of your 12 marking against the roof surface.

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. Simply mark a level at 12 hold it perfectly level and measure from the roof surface to your 12 mark this. Most people use it to mean the steepness of the roof. The term pitch has two different meanings when it comes to roofs.

Example a the measurements are taken from on top of the roof. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Marvel at your mathematical. The 7 means that the roof rises 7 for every 12 it runs.

Here s an easy safe way to determine the pitch from inside your attic. Some carpenters consider it more correct to use the term slope for the steepness and use pitch to describe the roof s overall dimensions. First measure 12 inches from one end of the level and make a mark. To convert between american roofing ratios and pitch degrees follow these steps.