How Do I Get The Pitch Of A Roof

The slope is the same as the pitch.

How do i get the pitch of a roof.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Find the inverse tangent of the pitch to find the angle in degrees. Check your results with the omni roof pitch calculator. For a roof with the ridge above one wall the span is the same as the run.

The roof pitch is necessary for two things one estimating the amount of material to be ordered for the job and two knowing what materials are suited for the roof. Carpenters use special conversion charts to estimate the roofing material required based on the slope and shape. First convert the pitch to a slope. To do this simply convert the rise and run as a fraction to a decimal form eg.

First measure 12 inches from one end of the level and make a mark. Rise run rise run slope. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. Marvel at your mathematical.

How to convert roof pitch to degrees. For more complex roofs you may need to calculate it section by section. To convert between american roofing ratios and pitch degrees follow these steps. Here s an easy safe way to determine the pitch from inside your attic.

A 12 12 pitch roof has a pitch angle of 45. To find the angle of a roof in degrees convert the pitch to a slope then convert to degrees by finding the arc tangent of the slope. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Divide the slope by two to get the pitch.

Divide the first part of the ratio by 12 to work out the pitch. But again we are jumping ahead of ourselves.