Roof Slope Degrees Chart

A ratio of 1 1 62 is known as the golden ratio and therefore the vast majority of roof pitch in degrees charts you see will be working to this ratio at the very least.

Roof slope degrees chart.

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree. Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

Recalculate this value into an angle. Pitch rise run 1 5 6 25. The combination of two numbers are used to display or show the roof pitch. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.

The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need. In essence a roof pitch chart is provided as a rough guide usually by a roofing company. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m.

On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. Then you ll be able to measure slope from an unfinished attic space under the roof. Calculate the roof pitch as the proportion of rise and run.