Roof Slope Degree

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

Roof slope degree.

Sangle tan 1 1 m 2 m 26 6. To see what the degree equivalents are for standard rise in run roof pitches see our page quick reference. Although there is no single standard roof pitch used on all sloped roofs factors such as roofing materials and local climate help to determine the appropriate range of pitches for a given building. Slope as angle for an elevation of 1 m over a distance of 2 m can be calculated as.

Roof pitch is a measurement of a roof s slope expressed as a ratio. Roof slope expressed as rise. An example for a steep sloped roof is 8 12. This means that the rise of the slope goes up or down 8 inches for every 12 inches.

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. The following table shows how the same common roof slopes can be expressed using rise in run ratios degrees and percentages. The table below shows common roof pitches and the equivalent grade degrees and radians for each. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Example slope as angle. Roof pitches exceeding the level of 9 12 or approximately 37 degrees are termed steep slope roofs. The most precise way to find the roof s slope is by measuring it from the underside. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7.

Pitched roofs begin with with slopes greater than 3 in 12. Some of the most common roof pitch types are conventional slope type roofs designed with pitch ranging from 4 12 to 9 12. Access one of the rafters then take the measurement this way. Most roof s have a pitch in the 4 12 to 9 12 range.

The slope of a roof or pitch is determined by how many inches the roof rises over 1 foot or 12 inches. Measuring the slope from the rafters. To put it in perspective the angle of this slope would be around 30 degrees. Degrees to roof pitch rise in run to see a table.

These are utilized in residential applications. The 45 degree roofs seen on a frame houses are 12 in 12 but roofs can be even steeper consider the mansard roofs introduced by french second empire architects in the middle of the 1800s. Also see our page quick reference. It s just a little math.

A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. Last updated july 10 2020.