1 2 Roof Pitch

The pitch can be expressed numerically as a fraction.

1 2 roof pitch.

0 pitch 1 00x the roof area. 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. 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. Commonly used roof pitches were given names such as greek.

Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. If a roof rises 2 in a length of 12 this is 2 12 roof pitch. Most roof s have a pitch in the 4 12 to 9 12 range. Roof pitch designations are comprised of two numbers indicating a ratio.

Roof pitch defined and explained. The ridge height is 1 9 to 1 7th the span an angle of 12 5 to 16. 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. 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.

The maths behind this number is that it is the square root of rise run 2 1. 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. 1 pitch 1 01 2 pitch 1 02 3 pitch 1 03 4 pitch 1 05 5 pitch 1 085 6 pitch 1 12 7 pitch 1 16 8 pitch 1 21 9 pitch 1 25 10 pitch 1 31 11 pitch 1 36 12 pitch 1 42. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

You can go by the measurements taken by walking the roof. A 12 to 24 pitch is expressed as 1 2. The table below shows common roof pitches and the equivalent grade degrees and radians for each. 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 is a term describing how steep or flat your roof slope is. Since this is a flat roof or nearly flat roof. Or the colon can replace the slash as in 2 12 or 7 12. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. The pitch fraction represents a certain amount of vertical rise over the entire span. 2 12 roof pitch angle 9 46 degrees.