How Do I Work Out The Pitch Of My Roof

The 7 means that the roof rises 7 for every 12 it runs.

How do i work out the pitch of my roof.

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. 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.

This is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations. Measure the rise of your roof. Simply mark a level at 12 hold it perfectly level and measure from the roof surface to your 12 mark this. 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.

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. For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. The easiest way to do this is by accessing a rafter in your attic if you can. You ll need a level that is 12 or longer and a tape measure.

The example to right shows 2 different ways to determine or calculate roof pitch also called roof slope. Here s an easy safe way to determine the pitch from inside your attic. Let s say it is equal to 1 5 m. 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.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. After measuring the slope estimate the roof pitch by dividing the slope by 2 if you have a simple gable roof. Divide the results by the number of 12 inch segments in your level. Even if you want to use a flat roof pitch calculator system you will be able to find one.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Calculate the rafter length substituting these values into the following formula. Pitch this is the incline of the roof expressed as a fraction. Enter any pitch or fraction of pitch to find angle.

Pitch rise run 1 5 6 25. Enter any angle or fraction of angle to find pitch. First measure 12 inches from one end of the level and make a mark. 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.

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. Example a the measurements are taken from on top of the roof.