Roof pitch defined and explained.
2 degree pitch roof.
The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.
Measurement of your house roof pitch is one of the most important things while constructing pitched roof.
Steeper slopes increase the sail effect that makes them susceptible to wind.
This measurement is best done on a bare roof because curled up roofing shingles will impair your 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.
Drag sliders to animate the results and diagram.
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.
Pitch tan angle where angle is the roof pitch expressed in degrees.
Pitch is the term used to describe the angle slope or slant of your roof.
The triangle diagram will be re drawn to scale with all dimensions marked.
Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch.
This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.
Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks.
If you want to find the roof pitch in the form of x 12 simply calculate the pitch and substitute 12 for the run length.
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.
These roofs have a pitch less than 4 12.
Lower slopes don t handle wind driven rain as well.
Look at the column labeled pitch then look under degrees to get the corresponding amount of degrees.
You have to pay higher cost for steeper pitch.
The table below shows common roof pitches and the equivalent grade degrees and radians for each.
To see roof pitch visual examples how to determine pitch.
The value displayed as the rise will be your x.
Roof pitch designations are comprised of two numbers indicating a ratio.
Or the colon can replace the slash as in 2 12 or 7 12.
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.
A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind.
8 12 pitch 33 75 degrees.