2 1 2 In 12 Roof Pitch

Roof pitch designations are comprised of two numbers indicating a ratio.

2 1 2 in 12 roof pitch.

Some roof specifications may express slope in the typical geometric terms of degrees. The table below shows common roof pitches and the equivalent grade degrees and radians for each. 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.

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. The maths behind this number is that it is the square root of rise run 2 1. Image 1 12 to 12 12 roof pitch 7 12 pitch. If a roof rises 1 in a length of 12 this is 1 12 roof pitch.

7 12 roof pitch 30 angle 30 26 degrees details. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. 8 12 roof pitch 33 angle 33 69 degrees details 9 12 roof pitch 37 angle 36 37 degrees details. Roof pitch defined and explained.

Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof. Roof pitch degree table. We included a roof pitch chart below the 7 12 example image and the calculator below that.

If this isn t practical then perform the same measurement on the underside of the roof. Pitch is the term used to describe the angle slope or slant of your roof. The combination of two numbers are used to display or show the roof pitch. For reference 2 12 equates to about 9 5º and 4 12 to about 18 5º.

Or the colon can replace the slash as in 2 12 or 7 12. 1 12 roof pitch angle 4 76 degrees.