How To Measure My Roof Pitch

Roof pitches are measured by their riseand run.

How to measure my roof pitch.

Make sure your have a 12 mark on your level. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. A roof s pitch is the rise for every 12 inches it runs. For a roof with the ridge above one wall the span is the same as the run.

The rise is the vertical length from the top of a stud wall to the peak of the roof. 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. 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. Some levels have markings already and in this case you are ready to go unless you have a factory label that covers the 12 mark like we do.

This method tends to be more accurate because no layers of roofing are involved. If you were to click on the peaks it wouldn t give you an accurate reading of your measurement. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. Let s say it is equal to 1 5 m.

When you need to determine your roof pitch all you need is a bubble level and a tape measure. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. Calculate the rafter length substituting these values into the following formula. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Run the distance from the outside edge of a perimeter stud wall to the center of the house. Roof pitch angle in degrees the measurements are taken from the bottom of the rafters the procedure to calculate roof pitch is the same. The slope is the same as the pitch. The run is the horizontal length from the outside edge of a perimeter stud wall to the center of the house.

For more complex roofs you may need to calculate it section by. Pitch rise run 1 5 6 25. Measure the rise of your roof. Thus in a simple style house you ll only have to click on the corners.

The level should be at least 12 long. To use this method there are 3 possible places to take your measurements. The run always remains. Calculate the roof pitch as the proportion of rise and run.