2 1 2 In 12 Roof Pitch

Pitch is the term used to describe the angle slope or slant of your roof.

2 1 2 in 12 roof pitch.

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. At slopes below 2 12 a granule surfaced asphalt membrane can be installed and many are available in colors to complement the shingle colors. Roof pitch designations are comprised of two numbers indicating a ratio. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

If this isn t practical then perform the same measurement on the underside of the roof. We included a roof pitch chart below the 7 12 example image and the calculator below that. The maths behind this number is that it is the square root of rise run 2 1. The combination of two numbers are used to display or show the roof pitch.

Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. Some roof specifications may express slope in the typical geometric terms of degrees. Image 1 12 to 12 12 roof pitch 7 12 pitch.

A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely makes the cut off for one of the most popular roofing material options. Or the colon can replace the slash as in 2 12 or 7 12. If a roof rises 1 in a length of 12 this is 1 12 roof pitch. Roof pitch defined and explained.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. For reference 2 12 equates to about 9 5º and 4 12 to about 18 5º. Most roof s have a pitch in the 4 12 to 9 12 range. 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.

8 12 roof pitch 33 angle 33 69 degrees details 9 12 roof pitch 37 angle 36 37 degrees details. 7 12 roof pitch 30 angle 30 26 degrees details.