2 12 Roof Slope

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

2 12 roof slope.

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. The combination of two numbers are used to display or show the roof pitch. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. If a roof rises 2 in a length of 12 this is 2 12 roof pitch.

Asphalt shingles continue to be the most widely installed roof covering option in north america. Simply put it s a shallow roof. Standing seam roof systems must have a minimum roof slope of 1 4 12. Pitch is the term used to describe the angle slope or slant of your roof.

Thus pitch is typically greater in areas of high rain or snowfall. Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important. 2 12 roof pitch angle 9 46 degrees.

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. Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater. Roof pitch is a term describing how steep or flat your roof slope is.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow.

Roof pitch designations are comprised of two numbers indicating a ratio. Definitions vary on when a roof is considered pitched. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. The exact roof slope in degrees is given by the arctangent.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Most roof s have a pitch in the 4 12 to 9 12 range.