The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
Roof systems for 2 12 slope roof.
They have a pitch ranging from 4 12 to 9 12.
Or the colon can replace the slash as in 2 12 or 7 12.
The most common slopes are.
3 12 1 2 12 and 1 4 12.
Simply put it s a shallow roof.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
If this isn t practical then perform the same measurement on the underside of the roof.
Roofing shingles and materials plus factory certified roofers including ratings from real homeowners from north america s largest roofing manufacturer.
Image 1 12 to 12 12 roof pitch 7 12 pitch.
For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters.
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 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance.
Residential and commercial roofing shingles slate roof ventilation roof underlayments asphaltic and tpo roof membranes.
Roof pitch designations are comprised of two numbers indicating a ratio.
Metal roof slope is expressed by a ratio indicating the roof pitch which notes the vertical rise of the roof in inches for every 12 inches the roof runs horizontally in other words dividing the vertical rise and its horizontal span.
Conventional roofs are the easiest to construct and you can walk on them safely.
So a roof with four inches of rise every 12 inches horizontally run would have a slope of 4 12 sometimes displayed as 4 12.
Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks.
Roof pitch degree table.
Generally such roofs have a pitch ranging from 1 2 12 to 2 12.
The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.
You can use either 2 6 or 2 4 rafters for roofs with a 3 12 pitch or greater but it depends on the overall size of your shed.
Roof pitch defined and explained.
For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters.
21 12 and higher.
We included a roof pitch chart below the 7 12 example image and the calculator below that.