2 1 2 In 12 Roof Pitch

For reference 2 12 equates to about 9 5º and 4 12 to about 18 5º.

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. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. Or the colon can replace the slash as in 2 12 or 7 12.

The combination of two numbers are used to display or show the roof pitch. 8 12 roof pitch 33 angle 33 69 degrees details 9 12 roof pitch 37 angle 36 37 degrees details. Pitch is the term used to describe the angle slope or slant of your roof. 7 12 roof pitch 30 angle 30 26 degrees details.

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Roof pitch defined and explained. We included a roof pitch chart below the 7 12 example image and the calculator below that. 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.

Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. Image 1 12 to 12 12 roof pitch 7 12 pitch. If this isn t practical then perform the same measurement on the underside of the roof. 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 designations are comprised of two numbers indicating a ratio. The maths behind this number is that it is the square root of rise run 2 1. Some roof specifications may express slope in the typical geometric terms of degrees. Most roof s have a pitch in the 4 12 to 9 12 range.

Roof pitch degree table. 1 12 roof pitch angle 4 76 degrees.