How To Figure Your 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.

How to figure your roof pitch.

Run the distance from the outside edge of a perimeter stud wall to the center of the house. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the corresponding horizontal distance or run you write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run. First measure 12 inches from one end of the level and make a mark.

The run always remains. You ll need a level that is 12 or longer and a tape measure. Roof pitch is measured by rise run rise the distance from the top of a stud wall to the peak of the roof. For more complex roofs you may need to calculate it section by.

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 to calculate roof pitch. The slope is the same as the pitch. If you want to know how to find the pitch of a roof then start with a calculator.

Even if you want to use a flat roof pitch calculator system you will be able to find one. As aforementioned there is no standard pitch of a roof. 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. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run.

One method to find the pitch is to climb on the roof and measure the rise for a 12 run. 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. For a roof with the ridge above one wall the span is the same as the run. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.

Rise run pitch where pitch is expressed in percent. You can use the following equations to find the length of the rafter and the slope. 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.