High pitched roofs often need extra fasteners and their pitch can be as high as 21 12.
Roof pitch for lean to.
In other words if there is a 1 1 2 ridge board nailed into the wall and the width of the lean to is 96 then the run will be 94 1 2 96 1 1 2 94 1 2.
Solutions for lean to sheds both the asphalt shingles and metal roofs can be installed on a low slope lean to shed roof if the proper product is used and it is installed properly.
Regular asphalt shingles that are rated for 4 in 12 roof slopes can be installed on lower slope roofs by simply installing a waterproof membrane under them.
They have a pitch ranging from 4 12 to 9 12.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
Conventional roofs are the easiest to construct and you can walk on them safely.
A low pitched roof is anything that is any roof with a pitch of 3 12 or less.
More commonly roll on membranes such that use heat to bond seams together is used as a roofing material.
You can also calculate roof pitch even without using a roof slope calculator.