7 12 Vs 9 12 Roof Pitch

Roof pitch defined and explained.

7 12 vs 9 12 roof pitch. Pitch is the term used to describe the angle slope or slant of your roof. What angle is a 7 12 pitch roof. If a roof rises 9 in a length of 12 this is 9 12 roof pitch. A roof pitch of 6 12 26 5 or less is considered easily walkable and no extra precautions are required.

Roof pitch designations are comprised of two numbers indicating a ratio. A 7 12 roof pitch angle 30 26 degrees. All those pitches that are lesser than 4 12 going to have an insignificant angle and will be recognized as low slope roofs. 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.

9 12 roof pitch angle 36 37 degrees. Pitches between 8 12 and 10 12 33 40 are also considered walkable but it is not advisable and if you have to walk on these roofs extreme caution should be. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. If this isn t practical then perform the same measurement on the underside of.

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. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. The most shared or standard roof pitches are between 4 12 and 9 12. Low slope roofing which requires special materials and techniques to avoid leaks and ranges from 1 12 2 12 to 4 12 1 in 3.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. Most roof s have a pitch in the 4 12 to 9 12 range. Conventional from 4 12 1 in 3 to 9 12 3 in 4. Or the colon can replace the slash as in 2 12 or 7 12.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. The combination of two numbers are used to display or show the roof pitch.