How Do You Find The Slope Of A Roof

Divide the rise by the run.

How do you find the slope of a roof.

There s no need to simplify them. Just write down the measurements you found. Here are the steps to follow for the roof angle calculator. For example when a roof has a slope of 5 12 the roof is 5 inches high for every 12 inches long.

Find the square root of that result if you know the roof slope in degrees simply find the secant using a scientific calculator. Another way of stating this is that the roof has a rise of 5 and a run of 12. If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks. For example if the roof slope is 45 then sec 45 1 414213.

First enter the value of the rise and choose the unit of measurement from the drop down menu. Low slope roofs are from 0 to 3 12 in pitch. Roof slopes are measured in units of twelves. Some sources consider low slope to include 3 12 pitch roofs.

Then enter the value of the run and choose the unit of measurement from the drop down menu. The horizontal distance in the ratio will be 12 while the vertical distance is the measurement you took from the rafters. Notes to the table above. As a shortcut the roof slope multiplier for any slope can be determined by finding the square root of rise run 1.

The slope of your roof is the ratio of vertical distance rise to horizontal distance run. You can measure with twelve feet or twelve yards but in this article we will use twelve inches. Using an online calculator.