1 2 Roof Pitch

Roof pitch designations are comprised of two numbers indicating a ratio.

1 2 roof pitch.

For example given a roof with a rise of 4 feet and a span of 24 feet the pitch is 1 to 6 pitch which can be expressed as the fraction of 1 6. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. 2 12 roof pitch angle 9 46 degrees. The ridge height is 1 9 to 1 7th the span an angle of 12 5 to 16.

A 12 to 24 pitch is expressed as 1 2. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Pitch is the term used to describe the angle slope or slant of your roof. The combination of two numbers are used to display or show the roof pitch.

Commonly used roof pitches were given names such as greek. You can go by the measurements taken by walking the roof. The pitch can be expressed numerically as a fraction. Roof pitch is a term describing how steep or flat your roof slope is.

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. Most roof s have a pitch in the 4 12 to 9 12 range. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. The pitch fraction represents a certain amount of vertical rise over the entire span. Since this is a flat roof or nearly flat roof. 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.

Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. 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. 0 pitch 1 00x the roof area. Roof pitch defined and explained.

Historically roof pitch was designated in two other ways. The maths behind this number is that it is the square root of rise run 2 1. Or the colon can replace the slash as in 2 12 or 7 12.