For that reason flat roofs are limited to these types of covering materials.
Roof pitch 12 2 addition.
The best roofs for a 2 12 pitch roof pitch basics.
How roof pitch determines suitable roofing systems.
A 12 12 pitch roof has a pitch angle of 45.
The table below shows common roof pitches and the equivalent grade degrees and radians for each.
A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal.
Divide the first part of the ratio by 12 to work out the pitch.
We included a roof pitch chart below the 7 12 example image and the calculator below that.
Image 1 12 to 12 12 roof pitch 7 12 pitch.
Flat and nearly flat roofs a pitch of 1 in 12 or 2 in 12 cannot be covered with shingles or shakes of any material since there is not enough angle to combat the danger of blow off.
Get your roof size by using this roof pitch calculator.
Roof is 6 12 pitch and measures at 2 400 square feet so 2400 x 1 12 2 688 2 88 sqs added for pitch.
Roof pitch degree table.
A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely.
If this isn t practical then perform the same measurement on the underside of the roof.
To convert between american roofing ratios and pitch degrees follow these steps.