2 1 2 In 12 Roof Pitch

Roof pitch degree table.

2 1 2 in 12 roof 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. We included a roof pitch chart below the 7 12 example image and the calculator below that. Roof pitch defined and explained. 8 12 roof pitch 33 angle 33 69 degrees details 9 12 roof pitch 37 angle 36 37 degrees details.

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Most roof s have a pitch in the 4 12 to 9 12 range. 7 12 roof pitch 30 angle 30 26 degrees details. 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.

Roof pitch designations are comprised of two numbers indicating a ratio. Image 1 12 to 12 12 roof pitch 7 12 pitch. 1 12 roof pitch angle 4 76 degrees. 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.

Some roof specifications may express slope in the typical geometric terms of degrees. If this isn t practical then perform the same measurement on the underside of the roof. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. 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. Pitch is the term used to describe the angle slope or slant of your roof. The maths behind this number is that it is the square root of rise run 2 1. At slopes below 2 12 a granule surfaced asphalt membrane can be installed and many are available in colors to complement the shingle colors.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. If a roof rises 1 in a length of 12 this is 1 12 roof pitch.