2 1 2 In 12 Roof Pitch

Image 1 12 to 12 12 roof pitch 7 12 pitch.

2 1 2 in 12 roof pitch. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Definitions vary on when a roof is considered pitched. In degrees 10 2 in 12 or 1 in 6 is considered a minimum. Thus pitch is typically greater in areas of high rain or snowfall.

Roof pitch defined and explained. 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. If this isn t practical then perform the same measurement on the underside of the roof. 2 12 roof pitch angle 9 46 degrees.

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. Or the colon can replace the slash as in 2 12 or 7 12. Roof pitch degree table.

Pitch is the term used to describe the angle slope or slant of your roof. 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 maths behind this number is that it is the square root of rise run 2 1. If a roof rises 2 in a length of 12 this is 2 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. Some roof specifications may express slope in the typical geometric terms of degrees. We included a roof pitch chart below the 7 12 example image and the calculator below that. The combination of two numbers are used to display or show the roof pitch.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. The exact roof slope in degrees is given by the arctangent. 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. For reference 2 12 equates to about 9 5º and 4 12 to about 18 5º.

Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them.