How To Calculate Pitch Of A Roof

For example if a roof has a pitch of 4 12 then for every 12 inches the building extends horizontally it rises 4 inches.

How to calculate pitch of a roof.

A speed square and level can be used to easily find the pitch of a roof. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. 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. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.

The roof pitch is the slope of the rafter. Calculate the roof slope. Set the level on the edge of the speed square as shown below then place the heel of the speed square on a rafter or gable edge of the roof. The pitch is commonly defined as the ratio of rise over run in the form of x 12.

Angle the angle of a roof is the same as the roof s slope except instead of being. The maths behind this number is that it is the square root of rise run 2 1. For example if your tape measure found a 6 inch vertical distance to the 12 inch mark on your level the slope is 6 12 or 6 in 12. A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof.

To accurately calculate the area of your roof you must first determine its slope or pitch. Even if you want to use a flat roof pitch calculator system you will be able to find one. Roof pitch calculator results explained. The rise is the height of the roof and the run is the horizontal span as pictured above.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run. What is the roof pitch. 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.

How roof pitch is calculated. Measure with a speed square. The pitch of this roof is 4 8 12. It is often compared to slope but is not exactly the same.

Write the roof slope as the ratio of rise over run or vertical distance over horizontal distance. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need. To see how pitch impacts the look of a garage and changes cost click the design center button on our pole barn kits page.