Express the slope of a metal roof by a ratio which indicates the pitch of the roof.
Minimum slope for shed roof.
The shed roof pitch has two slopes and the window above eaves level allows additional light into the shed.
This means that for every 12 inches of horizontal distance across the shed the roof will rise 4 inches.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
The minimum slope of a roof depends on the roof s profile.
An important factor to throw into a discussion about roof pitches is local planning rules and regulations.
The profile is the shape taken by the sheets when you bend them to form panels.
Furthermore a roof in a forest should have a slope of at least 2 12 to shed.
You need to consider the slope requirements of each panel to determine this minimum slope.
A quarter inch slope is the lowest you would go with a metal roof experts recommend at least a half inch minimum to ensure a weatherproof interior for your shed.
To shed the snow.
I always recommend at least a minimum pitch of 1 in 40.
This slope works well for sheds that are fairly narrow like 4 to 6 feet but for sheds that are 8 or wider the shed roof becomes unsightly high.
The roof joists can be fixed spanning directly between wall plates.
Remember metal roofing is more expensive than shingles.