2 Pitch Roof

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

2 pitch 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. 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. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. The triangle diagram will be re drawn to scale with all dimensions marked.

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 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. 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.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. Drag sliders to animate the results and diagram. 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 exact roof slope in degrees is given by the arctangent. Roof pitch designations are comprised of two numbers indicating a ratio. Or the colon can replace the slash as in 2 12 or 7 12. Pitch is the term used to describe the angle slope or slant of your roof.

Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Roof pitch defined and explained. Definitions vary on when a roof is considered pitched.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. Asphalt shingles continue to be the most widely installed roof covering option in north america. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. To make the bottom cut i laid out a level cut for a 4 in 12 pitch.

In degrees 10 2 in 12 or 1 in 6 is considered a minimum. The maths behind this number is that it is the square root of rise run 2 1. Since this is a flat roof or nearly flat roof.