Standard Roof Slope In Degrees

Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.

Standard roof slope in degrees.

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. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Roof slope expressed as rise.

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. 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. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. The most commonly used roof pitches fall in a range between 4 12 and 9 12.

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Pitches above 9 12 are very highly angled and are designated steep slope roofs. Roof pitches exceeding the level of 9 12 or approximately 37 degrees are termed steep slope roofs. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials.

The combination of two numbers are used to display or show the roof pitch. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. With the use of this converter it will be easier for you to locate a 30 degree roof pitch 20 degree roof pitch 25 degree roof pitch or a 15 degree roof pitch. To see what the degree equivalents are for standard rise in run roof pitches see our page quick reference.

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. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. These are utilized in residential applications.