How Do I Get The Pitch Of A Roof

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

How do i get the pitch of a roof.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Check your results with the omni roof pitch calculator. Divide the slope by two to get the pitch. Divide the first part of the ratio by 12 to work out the pitch.

A 12 12 pitch roof has a pitch angle of 45. 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. Before we get started with all that we need to find out the pitch of a roof. 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. For a roof with the ridge above one wall the span is the same as the run. First convert the pitch to a slope. Rise run rise run slope.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. But again we are jumping ahead of ourselves. First measure 12 inches from one end of the level and make a mark. What is a roof pitch.

How to convert roof pitch to degrees. To do this simply convert the rise and run as a fraction to a decimal form eg. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 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.

Find the inverse tangent of the pitch to find the angle in degrees. Marvel at your mathematical.