2 12 Roof Slope

The exact roof slope in degrees is given by the arctangent.

2 12 roof slope.

Standing seam roof systems must have a minimum roof slope of 1 4 12. If a roof rises 2 in a length of 12 this is 2 12 roof pitch. Roof pitch is a term describing how steep or flat your roof slope is. Roof pitch designations are comprised of two numbers indicating a ratio.

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. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

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. Asphalt shingles continue to be the most widely installed roof covering option in north america. 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.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. 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. Roof pitch defined and explained. The combination of two numbers are used to display or show the roof pitch.

Most roof s have a pitch in the 4 12 to 9 12 range. Thus pitch is typically greater in areas of high rain or snowfall. Simply put it s a shallow roof. 2 12 roof pitch angle 9 46 degrees.

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. Pitch is the term used to describe the angle slope or slant of your roof. 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.

A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater.