2 12 Roof Slope

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

2 12 roof slope.

A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Or the colon can replace the slash as in 2 12 or 7 12. Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater. Modified bitumen 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. Simply put it s a shallow roof. 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.

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. 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. 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.

Definitions vary on when a roof is considered pitched. 2 12 roof pitch angle 9 46 degrees. If a roof rises 2 in a length of 12 this is 2 12 roof pitch. Roof pitch designations are comprised of two numbers indicating a ratio.

The exact roof slope in degrees is given by the arctangent. 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. Thus pitch is typically greater in areas of high rain or snowfall. In degrees 10 2 in 12 or 1 in 6 is considered a minimum.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Standing seam roof systems must have a minimum roof slope of 1 4 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 combination of two numbers are used to display or show the roof pitch. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12.