How To Determine The Pitch Of Your Roof

A 12 12 pitch roof has a pitch angle of 45.

How to determine the pitch of your roof.

How to measure roof pitch. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. Divide the first part of the ratio by 12 to work out the pitch. If you can t get to your attic you can measure slope on your rooftop as long as it s safe to go up there.

To convert between american roofing ratios and pitch degrees follow these steps. Marvel at your mathematical. Here s an easy safe way to determine the pitch from inside your attic. Find the inverse tangent of the pitch to find the angle in degrees.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Knowing the pitch of your roof is useful when designing an addition installing skylights or cutting new rake boards. Before you calculate roof pitch you ll need to measure the slope of your roof. After measuring the slope estimate the roof pitch by dividing the slope by 2.

Place the end of your level the 0 inch point of your 12 marking against the roof surface. The easiest way to do this is by accessing a rafter in your attic if you can. This is the amount your roof inclines in a 1 foot span or the pitch. Check your results with the omni roof pitch calculator.