Minimum Shed Roof Angle

According to this code the minimum slope for asphalt shingles is 17 degrees or two vertical units to twelve units in the horizontal.

Minimum shed roof angle. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. I always recommend at least a minimum pitch of 1 in 40. Much depends on what your intended use for the shed actually is. Fix your roof deck and you are done.

The requirements for an asphalt shingles roof are contained in the international building code. Use a pitch of more than ten degrees for more efficient rain protection. A pitch of 10 degrees or less is typically regarded as a flat roof. The minimum requirement is 2 12.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. Well there are a few more steps to add the roof covering and trim but you can read about them below potential roof framing for a flat roofed shed. A shingle roof like this north dallas garage in the photo above may have a failure no matter how good a job the installer did. That works out to about nine degrees if that works better for you.

The roof comprises a simple beam. These are also the most common pitches for shed roofs. Again the most important consideration is the weather. Any roof from 4 12 to 9 12 is considered an ordinary angle for a roof.

However you can only use this pitch with built up roofing or specialized synthetic roofing.