How Do You Determine The Roof Pitch

Pitch tan angle where angle is the roof pitch expressed in degrees.

How do you determine the roof pitch.

How to measure roof pitch to measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. If you know the angle of the roof in degrees you can find the roof pitch by converting the angle in degrees to a slope then finding the rise by multiplying the slope by 12. Also referred to as roof slope or roof slant so what does the 7 12 in the example to the right mean. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.

Roof pitch calculator results explained. Check the surface of the. Divide the results by the number of 12 inch segments in your level. How to calculate roof pitch.

If you want to know how to find the pitch of a roof then start with a calculator. Position your level against the roof until the bubble of the vial sits between two lines. For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

To determine the y height measure from the bird s mouth up the calculated slope x in 12 to the top of the rafter. First measure 12 inches from one end of the level and make a mark. Slope tan degrees. Rafter rise run from the pythagorean theorem.

You can also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler. Before taking any measurements you must first confirm that it s safe to walk on your roof. Take a measurement of 12 inches using a level. Rise run pitch where pitch is expressed in percent.

For a roof with the ridge above one wall the span is the same as the run. The top of the ridge beam m y. For more complex roofs you may need to calculate it section by. Roof pitch calculator is determined by the number of inches it rises vertically for every 12 inches it extends horizontally.

The 7 means that the roof rises 7 for every 12 it runs. Then multiply the slope by 12 to get the rise. First find the slope by finding the tangent of the degrees eg. The slope is the same as the pitch.

To determine the finished height of the ridge beam add the rise m and the y height.