Yes, but only if Honest to God every nail is where it is supposed to be in the double laminate 3/4 inch area.
But, most roofers do not have the skill or the caring to achieve this. So in this case where i might be leading a crew for another license holder where everyone is not a complete anal perfectionist, my recommended minimum pitch would be a 5/12.
The roofers can be as sloppy as they care to be and it will be OK on a 5/12 and above and it wont leak.
But once the pitch reaches 7/12 or above, their sloppy nailing causes some shingles to eventually fall out.
If i am leading the crew where my state license and name is on the line, only the anal perfectionist are allowed on the roof. So 4/12s.
3/12s? completely out of the question.
3-tabs with two-ply (19 inch laps)underlayment
or standing seam metal roof.
There are 3-tabs out there that mimic the look of an architect and cost the same as architects and these are the ones that i try to lean the homeowner to.
I use a 4 foot level and a johnson pitch gauge on the roof before i decide what to do with it.
And no, you couldn’t out guess me on a roofs pitch.