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.

How to measure the rise of a roof.

Calculate the rafter length substituting these values. The roof slope is the horizontal angle of the roof. Measure the span of the building or consult your blueprints. Roof slope calculator example of use.

Then enter the value of the run and choose the unit of measurement from the drop down menu. Pitch measurement method 2 2. Total roof rise or change in elevation for a 38 degree sloping roof angle t with one giant rise or step of 7 8 feet to the center of the attic y 2 would have total a run x 2 of 10 feet. Here are the steps to follow for the roof angle calculator.

If this distance measures 4 inches you have a 4 in 12 pitch. For a roof with the ridge above one wall the span is the same as the run. The span of the building is the total width of the. You ll need to figure out the vertical distance also known as the rise over a 12 horizontal segment also known as the run.

8 inches and you have an 8 in 12 pitch. Record these values as roof rise over run with the vertical measurement listed first and the horizontal second. Check with the designer to get the unit rise for the roof which is the slope of the roof. 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.

Let s assume it is equal to 6 m. Measure the rise of your roof. Finally enter the value of the rafter length and. The slope is the same as the pitch.

The next step is to measure the pitch also referred to as the roof slope of the roof deck. First enter the value of the rise and choose the unit of measurement from the drop down menu. Measure the run length it is the horizontal distance between the roof ridge and the wall of the building. Let s say it is equal to 1 5 m.