The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
Min roof pitch ny.
Minimum roof pitch for shingles.
The following tableprovides the minimum required allowable roof slope for each type of roofing material mentioned in the code.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
You could also opt for a pvc flat roofing membrane.
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.
The minimum requirement is 2 12.
Nonclassified roof coverings shall be permitted on buildings of group r 3 and group u occupancies where there is a minimum fire separation distance of 6 feet measured from the leading edge of the roof.
What is the minimum pitch slope of an asphalt shingle roof.
If a roof slope rises say 4 inches when measured 12 inches along the bottom of a horizontal roof truss the roof slope is said to be 4 12.
The minimum roof slope allowed by code for any type of roofis in 12 applicable only to coal tar pitch roof systems.
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.
With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 20 0 for slate roofs.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.