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.

Marvel at your mathematical. To convert between american roofing ratios and pitch degrees follow these steps. How to convert roof pitch to degrees. First measure 12 inches from one end of the level and make a mark.

Carpenters use special conversion charts to estimate the roofing material required based on the slope and shape. 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 slope is the same as the pitch. 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.

What is a roof pitch. Check your results with the omni roof pitch calculator. Rise run rise run slope. Divide the slope by two to get the pitch.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Find the inverse tangent of the pitch to find the angle in degrees. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Divide the first part of the ratio by 12 to work out the pitch.

To do this simply convert the rise and run as a fraction to a decimal form eg. But again we are jumping ahead of ourselves. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. 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. First convert the pitch to a slope.