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.

How do i get the pitch of a roof.

First convert the pitch to a slope. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Carpenters use special conversion charts to estimate the roofing material required based on the slope and shape. But again we are jumping ahead of ourselves.

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. 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. For a roof with the ridge above one wall the span is the same as the run. Divide the slope by two to get the pitch.

Divide the first part of the ratio by 12 to work out the pitch. What is a roof pitch. A 12 12 pitch roof has a pitch angle of 45. First measure 12 inches from one end of the level and make a mark.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Here s an easy safe way to determine the pitch from inside your attic. Marvel at your mathematical. 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. 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. How to convert roof pitch to degrees. Find the inverse tangent of the pitch to find the angle in degrees.

Rise run rise run slope. The slope is the same as the pitch.