Roof pitch designations are comprised of two numbers indicating a ratio.
2 12 pitch roof options.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum.
Pitch is the term used to describe the angle slope or slant of your roof.
I ve been reading and reading but haven t found a good answer.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them.
There are some standing seam metal roofing options available from atas and other manufacturers that can be installed on a roof with pitch of 1 12.
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.
Current as of august 2020 asphalt shingles are an effective roof covering material for sloped roofs that can be successfully used on slopes as low as 2 12.