How Do I Get The Pitch Of A Roof

To do this simply convert the rise and run as a fraction to a decimal form eg.

How do i get the pitch of a roof.

But again we are jumping ahead of ourselves. Before we get started with all that we need to find out the pitch of a roof. To convert between american roofing ratios and pitch degrees follow these steps. For more complex roofs you may need to calculate it section by section.

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. What is a roof pitch. Check your results with the omni roof pitch calculator. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Find the inverse tangent of the pitch to find the angle in degrees. The slope is the same as the pitch. Divide the slope by two to get the pitch.

Here s an easy safe way to determine the pitch from inside your attic. How to convert roof pitch to degrees. 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.

Divide the first part of the ratio by 12 to work out the pitch. Carpenters use special conversion charts to estimate the roofing material required based on the slope and shape. Rise run rise run slope. First measure 12 inches from one end of the level and make a mark.

First convert the pitch to a slope. For a roof with the ridge above one wall the span is the same as the run.