Roof pitch designations are comprised of two numbers indicating a ratio.
2 pitch roof shingles.
The table below shows common roof pitches and the equivalent grade degrees and radians for each.
Asphalt shingles require a minimum roof pitch of 2 12 or greater.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
Installation on roof slopes below a 2 in 12 pitch is not recommended at all.
Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater.
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.
Roof pitch defined and explained.
Metal roof shingles require a minimum roof pitch of 3 12 or greater.
The average price range to shingle a 3 000 square foot shake roof is between 5 000 and 12 000 low cost for installation is around 3 600 and high cost is about 120 000 for a single square of roofing 100 square feet the average price is 170 to 400.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
Let us recap on the minimum roof pitch required for each type of roofing material.
For slopes of 2 up to but not including 4 per foot a double layer of roof deck protection is required.
Well the minimum pitch level for roof shingles is actually 4 12 thus you may need to install an underlayment if you worry about possible water leaks.
They might if they don t catch measure the pitch but you would be taking some chances.
Most roof s have a pitch in the 4 12 to 9 12 range.
However if your roof is quite steep with a pitch of above 2 12 you should choose roof shingles rolled roofing is strictly restricted for a roof pitch of under 2 12.
Pitch is the term used to describe the angle slope or slant of your roof.
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.
Shinglemate roofpro 15 or 30 felt tigerpaw or deck armor roof deck protection.
Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them.
The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.
Or the colon can replace the slash as in 2 12 or 7 12.