2 Pitch Roof

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

2 pitch roof.

Since this is a flat roof or nearly flat roof. Pitch is the term used to describe the angle slope or slant of your roof. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. To let the jacks sit plumb on top of the sleepers we angled the level cuts to the 3 1 2 in 12 pitch of the shed roof setting the circular saw to a 16 degree bevel the degree equivalent of a 3 1 2 in 12 pitch.

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. Or the colon can replace the slash as in 2 12 or 7 12. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Drag sliders to animate the results and diagram.

Asphalt shingles continue to be the most widely installed roof covering option in north america. 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 maths behind this number is that it is the square root of rise run 2 1. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. 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. To make the bottom cut i laid out a level cut for a 4 in 12 pitch. The exact roof slope in degrees is given by the arctangent.

0 pitch 1 00x the roof area. The triangle diagram will be re drawn to scale with all dimensions marked. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. 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. You can go by the measurements taken by walking the roof. 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. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

Definitions vary on when a roof is considered pitched. Roof pitch defined and explained. Most roof s have a pitch in the 4 12 to 9 12 range.