12 12 Roof Pitch Degrees

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

12 12 roof pitch degrees.

Lower slopes don t handle wind driven rain as well. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. For every 12 horizontal feet the roof changes 8 feet in vertical height. To convert between american roofing ratios and pitch degrees follow these steps.

So use the 12 inch level as a constant run and 18 inch ruler as a variable rise. Also referred to as 9 12 roof slope 9 on 12 9 to 12 and 9 12 roof angle 9 12 roof. Most roof s have a pitch in the 4 12 to 9 12 range. Divide the first part of the ratio by 12 to work out the pitch.

9 12 roof pitch to angle 36 87 degrees. What is a 9 12 roof pitch. 9 12 roof pitch equivalents roof rises 9 in a length of 12. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

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. Select inches to enter decimal inches or millimeters for metric. 9 12 roof pitch angle 36 87 degrees. Steeper slopes increase the sail effect that makes them susceptible to wind.

High and low pitch examples. Find the inverse tangent of the pitch to find the angle in degrees. Roof pitch angle roof pitch multiplier 1 12 4 76 1 0035 2 12 9 46 1 0138. 9 12 roof pitch angle to 36 87 degrees.

9 12 roof pitch 37 degrees. What roof angle in degrees. Locate its tangent or tan and follow the left row for you to read its corresponding degree. Angle scale if a roof or ramp rises 4 in a length of 12 the pitch is 4 in 12 which is 18 43 or 33 33 grade enter base length to calculate rise and diagonal for current pitch angle.

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. For this you can take help from roof pitch factor chart. A 12 12 pitch roof has a pitch angle of 45. Find all the needed factors in order to determine the pitch angle s degree.

A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. If your house roof is built with multiple pitches then square per roof must be calculated differently. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle.