Roof Slope Degree

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.

Roof slope degree.

Most roof s have a pitch in the 4 12 to 9 12 range. Roof slope expressed as rise. Last updated july 10 2020. The following table shows how the same common roof slopes can be expressed using rise in run ratios degrees and percentages.

An example for a steep sloped roof is 8 12. 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. Some of the most common roof pitch types are conventional slope type roofs designed with pitch ranging from 4 12 to 9 12. Measuring the slope from the rafters.

Mansard roofs with nearly vertical faces can boast a pitch of 20 in 12. Sangle tan 1 1 m 2 m 26 6. Degrees to roof pitch rise in run to see a table. To put it in perspective the angle of this slope would be around 30 degrees.

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. See below after the table for directions on how to convert any roof slope from one form to another even roof slopes not shown in the table. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Roof pitch is a measurement of a roof s slope expressed as a ratio.

Either way let s see how you can calculate the slope of a roof without using a roof slope calculator. These are utilized in residential applications. To see what the degree equivalents are for standard rise in run roof pitches see our page quick reference. Also see our page quick reference.

Pitched roofs begin with with slopes greater than 3 in 12. 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. 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 most precise way to find the roof s slope is by measuring it from the underside.

It s just a little math. Access one of the rafters then take the measurement this way. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. Example slope as angle.

Slope as angle for an elevation of 1 m over a distance of 2 m can be calculated as. The slope of a roof or pitch is determined by how many inches the roof rises over 1 foot or 12 inches.