How Do You Determine The Roof Pitch

Also referred to as roof slope or roof slant so what does the 7 12 in the example to the right mean.

How do you determine the roof pitch.

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. First measure 12 inches from one end of the level and make a mark. Pitch tan angle where angle is the roof pitch expressed in degrees.

To determine the y height measure from the bird s mouth up the calculated slope x in 12 to the top of the rafter. Check the surface of the. Take a measurement of 12 inches using a level. For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12.

Even if you want to use a flat roof pitch calculator system you will be able to find one. Roof pitch calculator is determined by the number of inches it rises vertically for every 12 inches it extends horizontally. Rafter rise run from the pythagorean theorem. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

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. Divide the results by the number of 12 inch segments in your level. Rise run pitch where pitch is expressed in percent. Roof pitch calculator results explained.

Take the measurement of the vertical. This will allow your project to carry the depth and detail in the roof that you wanted as well as make sure that it will maintain a sturdy and effective nature throughout. First find the slope by finding the tangent of the degrees eg. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.

Then multiply the slope by 12 to get the rise. Position your level against the roof until the bubble of the vial sits between two lines. The top of the ridge beam m y. The 7 means that the roof rises 7 for every 12 it runs.

The slope is the same as the pitch. Slope tan degrees. 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. How to calculate roof pitch.

For a roof with the ridge above one wall the span is the same as the run.