How Do I Figure Roof Pitch

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.

How do i figure roof pitch.

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. Position your level against the roof until the bubble of the vial sits between two lines. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.

For a roof with the ridge above one wall the span is the same as the run. Pitch tan angle where angle is the roof pitch expressed in degrees. One method to find the pitch is to climb on the roof and measure the rise for a 12 run. Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called 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. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. Rafter rise run from the pythagorean theorem. The slope is the same as the pitch.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Check the surface of the. Roof pitch roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. Here s an easy safe way to determine the pitch from inside your attic.

Take a measurement of 12 inches using a level. How roof pitch is calculated to accurately calculate the area of your roof you must first determine its slope or pitch. First measure 12 inches from one end of the level and make a mark. Take the measurement of the vertical.

It is often compared to slope but is not exactly the same. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. How to calculate roof pitch. For more complex roofs you may need to calculate it section by.

Before taking any measurements you must first confirm that it s safe to walk on your roof. To see how pitch impacts the look of a garage and changes cost click the design center button on our pole barn kits page.