How Do You Find The Slope Of A Roof

There s no need to simplify them.

How do you find the slope of a roof.

For example when a roof has a slope of 5 12 the roof is 5 inches high for every 12 inches long. Using an online calculator. Notes to the table above. The slope of your roof is the ratio of vertical distance rise to horizontal distance run.

Just write down the measurements you found. The horizontal distance in the ratio will be 12 while the vertical distance is the measurement you took from the rafters. Find the square root of that result if you know the roof slope in degrees simply find the secant using a scientific calculator. Some sources consider low slope to include 3 12 pitch roofs.

You can measure with twelve feet or twelve yards but in this article we will use twelve inches. Low slope roofs are from 0 to 3 12 in pitch. Roof slopes are measured in units of twelves. The slope of your roof is the ratio of the vertical distance or rise of the roof to the horizontal distance or run.

Another way of stating this is that the roof has a rise of 5 and a run of 12. First enter the value of the rise and choose the unit of measurement from the drop down menu. For example if you find 4 inches of height with the tape measure at the 12 inch mark on the level your slope is 4 12 or 4 in 12. As a shortcut the roof slope multiplier for any slope can be determined by finding the square root of rise run 1.

Divide the rise by the run. If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks. Here are the steps to follow for the roof angle calculator.