For more complex roofs you may need to calculate it section by.
How to measure the pitch of a roof.
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.
Check the surface of the.
Measure the rise of your roof.
Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run.
Position your level against the roof until the bubble of the vial sits between two lines.
First measure 12 inches from one end of the level and make a mark.
Take a measurement of 12 inches using a level.
Next measure vertically from the 12 inch mark on the level straight up to the underside of the rafter as illustrated below.
The measurements are taken from the bottom of the rafters the procedure to calculate roof pitch is the same.
To see how pitch impacts the look of a garage and changes cost click the design center button on our pole barn kits page.
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 simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.
Let s say it is equal to 1 5 m.
Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.
Pitch measurement method 1 1.
The roof s pitch is the number of inches the roof rises in 12 inches.
One method to find the pitch is to climb on the roof and measure the rise for a 12 run.
This method tends to be more accurate because no layers of roofing are involved.
Measure the run length it is the horizontal distance between the roof ridge and the wall of the building.
For a roof with the ridge above one wall the span is the same as the run.
You ll need a level that is 12 or longer and a tape measure.
Before taking any measurements you must first confirm that it s safe to walk on your roof.
Take the measurement of the vertical.
Roof pitch is the angle that is created as the rafter leaves the ceiling joist.
If this distance measures 4 inches you have a 4 in 12 pitch.
Let s assume it is equal to 6 m.
Therefore mark off 12 inches on the level and place it down horizontally against the roof rafter.
Calculate the rafter length substituting these values.
8 inches and you have an 8 in 12 pitch.
Roof slope calculator example of use.
On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof.
