How Do You Determine Roof Slope

Rafter rise run from the pythagorean theorem.

How do you determine roof slope.

The slope of your roof is the ratio of the vertical distance or rise of the roof to the horizontal distance or run. If you want to know how to find the pitch of a roof then start with a calculator. 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. How do you calculate the slope of a roof.

Access one of the rafters then take. The slope is the same as the 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 roof pitch is calculated to accurately calculate the area of your roof you must first determine its slope or pitch.

Use a level against the underside of the rafter you re measuring to get the most accurate value. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. To do this you will need to write down the measurements that you have taken from the rafters. For more complex roofs you may need to calculate it section by.

For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. How to calculate roof pitch. Locate the level s 12 inch mark. The most precise way to find the roof s slope is by measuring it from the underside.

Rise run pitch where pitch is expressed in percent. You will now be able to determine the slope of your roof.