How To Figure Pitch Roof Pitch

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

How to figure pitch roof pitch.

How to calculate roof pitch. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. You ll need a level that is 12 or longer and a tape measure. A 12 in 12 pitch is a steep 45 degree angle roof.

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. 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. Roof pitch roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.

If you are trying to learn how to measure roof pitch calculations accurately you should really consider the importance of using a calculator. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. For more complex roofs you may need to calculate it section by. Take a measurement of 12 inches using a level.

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. For a roof with the ridge above one wall the span is the same as the run. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. The slope is the same as the pitch.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Rise run pitch where pitch is expressed in percent. Before taking any measurements you must first confirm that it s safe to walk on your roof. One method to find the pitch is to climb on the roof and measure the rise for a 12 run.

The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. First measure 12 inches from one end of the level and make a mark. Take the measurement of the vertical. Pitch tan angle where angle is the roof pitch expressed in degrees.

See the image below for more explanation on rise run and pitch. 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. Check the surface of the. If you are trying hard to work out how to figure roof pitch measurements the calculator takes away all of those problems for you more or less instantly.