To be honest the shingles and double felt will work about as well as leaving just the plywood to fight the elements.
Roof picth 2 12.
Image 1 12 to 12 12 roof pitch 7 12 pitch.
Ice and water shield as an underlayment.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
What is a 2 12 roof pitch if a roof rises 2 in a length of 12 this is 2 12 roof pitch.
The table below shows common roof pitches and the equivalent grade degrees and radians for each.
What is the minimum slope for an asphalt shingle roof.
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.
Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them.
Roof pitch degree table.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
About 6 months later some of the plywood will be saturated.
Most roof s have a pitch in the 4 12 to 9 12 range.
A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely makes the cut off for one of the most popular roofing material options.
We included a roof pitch chart below the 7 12 example image and the calculator below that.
If this isn t practical then perform the same measurement on the underside of the roof.