Divide the first part of the ratio by 12 to work out the pitch.
12 12 roof pitch degrees.
Find the inverse tangent of the pitch to find the angle in degrees.
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.
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.
What roof angle in degrees.
A 12 12 pitch roof has a pitch angle of 45.
What is a 9 12 roof pitch.
Select inches to enter decimal inches or millimeters for metric.
Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle.
The 12 inch run is considered standard in roof pitch or angle terminologies.
9 12 roof pitch equivalents roof rises 9 in a length of 12.
For every 12 horizontal feet the roof changes 8 feet in vertical height.
9 12 roof pitch 37 degrees.
If your house roof is built with multiple pitches then square per roof must be calculated differently.
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.
9 12 roof pitch angle 36 87 degrees.
The table below shows common roof pitches and the equivalent grade degrees and radians for each.
To convert between american roofing ratios and pitch degrees follow these steps.
Most roof s have a pitch in the 4 12 to 9 12 range.
Find all the needed factors in order to determine the pitch angle s degree.
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.
Lower slopes don t handle wind driven rain as well.
For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep.
9 12 roof pitch angle to 36 87 degrees.
A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily.
Steeper slopes increase the sail effect that makes them susceptible to wind.
9 12 roof pitch to angle 36 87 degrees.
The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.
Roof pitch angle roof pitch multiplier 1 12 4 76 1 0035 2 12 9 46 1 0138.
High and low pitch examples.
