How Do I Figure Out Roof Pitch

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.

How do i figure out roof pitch.

First measure 12 inches from one end of the level and make a mark. For a roof with the ridge above one wall the span is the same as the run. How to calculate roof pitch. You ll need a level that is 12 or longer and a tape measure.

For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. 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. Pitch tan angle where angle is the roof pitch expressed in degrees.

Check the surface of the. Take a measurement of 12 inches using a level. On the roof hold the level perfectly level and measure the height from the roof to the level 12 inches away from where the level touches the surface this will be the rise. See the image below for more explanation on rise run and pitch.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Rafter rise run from the pythagorean theorem. Before taking any measurements you must first confirm that it s safe to walk on your roof. For more complex roofs you may need to calculate it section by.

Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. For example if the roof rises 4 feet and the span is 16 feet twice the run then the pitch is 4 16 or 1 4. Rise run pitch where pitch is expressed in percent. Take the measurement of the vertical.

Position your level against the roof until the bubble of the vial sits between two lines.