15 Degree Roof Slope

Divide the first part of the ratio by 12 to work out the pitch.

15 degree roof slope. It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5. Roof pitch calculator results explained. Lower slopes don t handle wind driven rain as well. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

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. Traditionally a minimum roof pitch of 20 was recommended in bs 5534 but modern tiles and slates have now been designed for applications as low as 15. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

Find the inverse tangent of the pitch to find the angle in degrees. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. To convert between american roofing ratios and pitch degrees follow these steps. 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.

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 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. 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. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.

Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. 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. Steeper slopes increase the sail effect that makes them susceptible to wind. What degree angle is a 12 12 pitch roof.

Angle the angle of a roof is the same as the roof s slope except instead of being. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.