Roof pitch designations are comprised of two numbers indicating a ratio.
Common roof pitch angles used by builders.
Historically roof pitch was designated in two other ways.
Although there is no single standard roof pitch used on all sloped roofs factors such as roofing materials and local climate help to determine the appropriate range of pitches for a given building.
The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.
Commonly used roof pitches were given names such as greek.
The ridge height is 1 9 to 1 7th the span an angle of 12 5 to 16.
Roof pitch defined and explained.
Or the colon can replace the slash as in 2 12 or 7 12.
A ratio of the ridge height to the width of the building span and as a ratio of the rafter length to the width of the building.
Pitch is the term used to describe the angle slope or slant of your roof.