Minimum Shed Roof Angle

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.

Minimum shed roof angle.

A pitch of 10 degrees or less is typically regarded as a flat roof. Again the most important consideration is the weather. However you can only use this pitch with built up roofing or specialized synthetic roofing. If you are only trying to keep a wood pile dry or storing a few outdoor tools and light machinery out of the weather then you might consider a simple single pitch roof since most everything inside will be stored at ground level and pulled out from the outside of the shed.

A flat roof is more likely to allow rain to pool and this can cause damage especially if the roof is made of a porous substance like wood. This translates into a fall of just under 2 5 on an 8 foot roof. Fix your roof deck and you are done. The minimum requirement is 2 12.

The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. 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. These are also the most common pitches for shed roofs. The requirements for an asphalt shingles roof are contained in the international building code.

The roof comprises a simple beam. Much depends on what your intended use for the shed actually is. 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. Use a pitch of more than ten degrees for more efficient rain protection.

I always recommend at least a minimum pitch of 1 in 40.