Slope Of A 2 12 Roof

What is the minimum slope for an asphalt shingle roof.

Slope of a 2 12 roof.

Then you ll be able to measure slope from an unfinished attic space under the roof. 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. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units.

The best roofs for a 2 12 pitch roof pitch basics. Minimum roof slope roof pitch r905 3 2. Learn more about finding the angle of a line using our slope calculator. Conventional roofs are the easiest to construct and you can walk on them safely.

High pitched roofs often need extra fasteners and their pitch can be as high as 21 12. Common roof pitches and equivalent grade degree and radian angles. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. You can also calculate roof pitch even without using a roof slope calculator.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. These roofs have a pitch less than 4 12. Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely.

Asphalt shingles continue to be the most widely installed roof covering option in north america. 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. Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal.

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.