How Do You Find The Slope Of A Roof

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.

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. Using an online calculator. 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. Here are the steps to follow for the roof angle calculator. First enter the value of the rise and choose the unit of measurement from the drop down menu. Just write down the measurements you found.

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. There s no need to simplify them. For example if the roof slope is 45 then sec 45 1 414213. Finally enter the value of the rafter length and.

Low slope roofs are from 0 to 3 12 in pitch. The horizontal distance in the ratio will be 12 while the vertical distance is the measurement you took from the rafters. Divide the rise by the run. For example when a roof has a slope of 5 12 the roof is 5 inches high for every 12 inches long.

As a shortcut the roof slope multiplier for any slope can be determined by finding the square root of rise run 1. Notes to the table above. If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks.