You ll need to figure out the vertical distance also known as the rise over a 12 horizontal segment also known as the run.
How to measure the rise of a roof.
For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.
Record these values as roof rise over run with the vertical measurement listed first and the horizontal second.
Then enter the value of the run and choose the unit of measurement from the drop down menu.
Finally enter the value of the rafter length and.
For more complex roofs you may need to calculate it section by.
The span of the building is the total width of the.
Roof slope calculator example of use.
Here are the steps to follow for the roof angle calculator.
For a roof with the ridge above one wall the span is the same as the run.
How to calculate roof rise.
Let s say it is equal to 1 5 m.
The roof slope is the horizontal angle of the roof.
Pitch measurement method 2 2.
First enter the value of the rise and choose the unit of measurement from the drop down menu.
Let s assume it is equal to 6 m.
On a 38 degree sloping roof angle t each individual vertical rise of 9 4 y 1 would have a horizontal run x 1 of 12 inches.
Check with the designer to get the unit rise for the roof which is the slope of the roof.
Measure the rise of your roof.
Measure the span of the building or consult your blueprints.
If this distance measures 4 inches you have a 4 in 12 pitch.
Measure the run length it is the horizontal distance between the roof ridge and the wall of the building.
The slope is the same as the pitch.
8 inches and you have an 8 in 12 pitch.
The next step is to measure the pitch also referred to as the roof slope of the roof deck.