Unsupported Roof Overhang

A cantilever is any structure such as a roof or floor overhang that is braced internally.

Unsupported roof overhang.

If your roof is strong enough it can extend beyond the support walls without external bracing. Inadequate nailing of the sheathing to supporting framing or inadequate connections of the framing at the rake edge that supports the roof. Building a shed roof with an overhang is an important part of protecting your shed and thus should not be overlooked. Low slope roofs are more subject to snow load damage than steeper pitches and so typically have little or no unsupported overhang which can bend.

Because there is so little danger of water damage there is no required overhang and overhang lengths are minimal and sometimes nonexistent. Also note that a new fully adhered membrane is installed on the original roof deck replacing the one installed 17 years ago is folded down to catch the top edge of the wall water control layer. Steeper pitched metal roofs typically do not require much overhang because snow and ice slides off the smooth surface so easily. If you are building trusses it is easy to make part of the roof into a cantilevered extension.

Further note that the 3 layers of 2 inch rigid. The other common wind related failure at gable ends is uplift of the roof decking at the overhang. Moderate climates in moderate climates there is some damage of wood decay and a roof overhang is recommended. A shed roof overhang is something most homeowners don t think about until their standing in the rain trying to get the door unlocked or fretting about all the water that s suddenly pooling around the shed s foundation.

Over roof insulation the gable overhang has been cut flush with the wall sheathing.