Then enter the value of the run and choose the unit of measurement from the drop down menu.
How do you find the slope of a roof.
If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks.
Using an online calculator.
First enter the value of the rise and choose the unit of measurement from the drop down menu.
Finally enter the value of the rafter length and.
There s no need to simplify them.
As a shortcut the roof slope multiplier for any slope can be determined by finding the square root of rise run 1.
You can measure with twelve feet or twelve yards but in this article we will use twelve inches.
The horizontal distance in the ratio will be 12 while the vertical distance is the measurement you took from the rafters.
Some sources consider low slope to include 3 12 pitch roofs.
Find the square root of that result if you know the roof slope in degrees simply find the secant using a scientific calculator.
For example when a roof has a slope of 5 12 the roof is 5 inches high for every 12 inches long.
The slope of your roof is the ratio of the vertical distance or rise of the roof to the horizontal distance or run.
Roof slopes are measured in units of twelves.
Here are the steps to follow for the roof angle calculator.
Just write down the measurements you found.
Notes to the table above.
Another way of stating this is that the roof has a rise of 5 and a run of 12.
For example if the roof slope is 45 then sec 45 1 414213.
Divide the rise by the run.