How To Determine The Pitch Of Your Roof

Find the inverse tangent of the pitch to find the angle in degrees.

How to determine the pitch of your roof.

This is the amount your roof inclines in a 1 foot span or the pitch. The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need. Place the end of your level the 0 inch point of your 12 marking against the roof surface. After measuring the slope estimate the roof pitch by dividing the slope by 2.

Divide the first part of the ratio by 12 to work out the pitch. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. A 12 12 pitch roof has a pitch angle of 45. Climb up on your roof.

How to measure roof pitch. Check your results with the omni roof pitch calculator. To convert between american roofing ratios and pitch degrees follow these steps. The easiest way to do this is by accessing a rafter in your attic if you can.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. 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. Knowing the pitch of your roof is useful when designing an addition installing skylights or cutting new rake boards. Hold the level straight and level bubble centered and then measure the vertical distance down from the your 12 mark on the level down to the roof.