Minimum Shed Roof Angle

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

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. I always recommend at least a minimum pitch of 1 in 40. 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. Again the most important consideration is the weather.

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. The requirements for an asphalt shingles roof are contained in the international building code. 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 pitch of 10 degrees or less is typically regarded as a flat roof.

According to this code the minimum slope for asphalt shingles is 17 degrees or two vertical units to twelve units in the horizontal. The roof comprises a simple beam. Any roof from 4 12 to 9 12 is considered an ordinary angle for a roof. Much depends on what your intended use for the shed actually is.

These are also the most common pitches for shed roofs. The minimum requirement is 2 12. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. 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.

Use a pitch of more than ten degrees for more efficient rain protection.