1 2 Pitch Roofing

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

1 2 pitch roofing.

The maths behind this number is that it is the square root of rise run 2 1. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Or the colon can replace the slash as in 2 12 or 7 12. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

Most roof s have a pitch in the 4 12 to 9 12 range. The pitch can be expressed numerically as a fraction. Pitch is the term used to describe the angle slope or slant of your roof. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

A 12 to 24 pitch is expressed as 1 2. 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. 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. Roof pitch designations are comprised of two numbers indicating a ratio.

Thus pitch is typically greater in areas of high rain or snowfall. 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. 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 exact roof slope in degrees is given by the arctangent.

Roof pitch defined and explained. Definitions vary on when a roof is considered pitched. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. 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 pitch fraction represents a certain amount of vertical rise over the entire span. You can go by the measurements taken by walking the roof. 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. In degrees 10 2 in 12 or 1 in 6 is considered a minimum.

0 pitch 1 00x the roof area.