Slope Of A 2 12 Roof

Most roof s have a pitch in the 4 12 to 9 12 range.

Slope of a 2 12 roof.

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely. You can also calculate roof pitch even without using a roof slope calculator. High pitched roofs often need extra fasteners and their pitch can be as high as 21 12.

A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal. Then you ll be able to measure slope from an unfinished attic space under the roof. This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units. 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. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. What is the minimum slope for an asphalt shingle roof. The best roofs for a 2 12 pitch roof pitch basics.

Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. Common roof pitches and equivalent grade degree and radian angles. These roofs have a pitch less than 4 12. 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.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Asphalt shingles continue to be the most widely installed roof covering option in north america. Conventional roofs are the easiest to construct and you can walk on them safely. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter.

Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree. Minimum roof slope roof pitch r905 3 2.