How Do I Work Out The Pitch Of My Roof

Here s an easy safe way to determine the pitch from inside your attic.

How do i work out the pitch of my roof.

First measure 12 inches from one end of the level and make a mark. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Even if you want to use a flat roof pitch calculator system you will be able to find one. Calculate the rafter length substituting these values into the following formula.

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. The example to right shows 2 different ways to determine or calculate roof pitch also called roof slope. Enter any angle or fraction of angle to find pitch. You ll need a level that is 12 or longer and a tape measure.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Pitch this is the incline of the roof expressed as a fraction. 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. The easiest way to do this is by accessing a rafter in your attic if you can.

This is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations. 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. The 7 means that the roof rises 7 for every 12 it runs. While pitch and slope are used interchangeably they are not the same span also known as gable width this is based on the total footprint of the house and refers to the distance between two exterior walls.

If you can t get to your attic you can measure slope on your rooftop as long as it s safe to go up there. Calculate the roof pitch as the proportion of rise and run. You can also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler. Before you calculate roof pitch you ll need to measure the slope of your roof.

As aforementioned there is no standard pitch of a roof. If you want to know how to find the pitch of a roof then start with a calculator. Simply mark a level at 12 hold it perfectly level and measure from the roof surface to your 12 mark this. Pitch rise run 1 5 6 25.

One method to find the pitch is to climb on the roof and measure the rise for a 12 run. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. Let s say it is equal to 1 5 m.

Divide the results by the number of 12 inch segments in your level. Example a the measurements are taken from on top of the roof.