30 Degree Roof

A 7 12 pitch equals 30 26 degrees.

30 degree roof. However if you to do the process using your own knowledge you can still convert pitch to degrees by dividing the rise and run and get its corresponding measurement. 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. If it rises only 6 for every 12 it s a 6 12 pitch. The minimum roof pitch for shedding snow is around 30 or a 6 12 or 7 12 slope although this is not a definite as the material of your roof the direction of the snow and wind are some factors that can affect whether or not snow will slide as roofs of as little as 10 have been reported to shed snow.

The steepest pitch for a roof is 12 12 which creates a 45 degree angle and where the roof vertically rises 12 inches for every 12 inches it goes horizontally. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. 45 this is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations. Steeper slopes increase the sail effect that makes them susceptible to wind.

Roof pitch is measured in a rise to run ratio with the vertical rise always shown first. 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. Accuracy is key here because miscalculations could lead to major overspending. Enter any pitch or fraction of pitch to find angle.

The following diagram will let you easily convert roof pitch to degrees. Lower slopes don t handle wind driven rain as well. Enter any angle or fraction of angle to find pitch. To determine material quantities you need to do some calculations.

Most roof s have a pitch in the 4 12 to 9 12 range. Common roof pitches and equivalent grade degree and radian angles. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind.

The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. 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. For example a 7 12 roof pitch means that for ever 12 of horizontal distance the roof will increase in height by 7.