How Far Over The Wall Should The Roof Extend

For gabled roofs the roof rafters extending beyond the wall caps creating an angled roof overhang on the eaves.

How far over the wall should the roof extend.

How far should the roof extend over the gutter. Coming from me it should by now. Over roof insulation the gable overhang has been cut flush with the wall sheathing. Because this style of a shed has a flat roof it can facilitate a wider overhang which is ideal for storage.

The back edge of the gutter should tuck up behind the dripedge if you have it otherwise the edge of the shingles should extend well over the back half of the gutter so the drips cannot get behind it and rot the fascia board. This will protect a roof from most types of damage. Here phil explains how much overhang a roof should have at the gutter. Too much overhang and the shingles could blow off in high winds.

A normal gutter will have about 1 2 3 4 of its width sticking out beyond the shingles to catch the runoff. With a flat shed roof the roof simply extends past the wall plate to provide an overhang. This gets snow and ice drip line farther away from the building walls without the danger of the metal roofing bending under the weight. I have a lovely old bloke next door in his late 70 s who has 12 x 7 m carport that was installed pre google earth.

The outer ends of a roof s rafters the sloped members that give the roof its pitch provide shade divert rain and create soffit space for attic ventilation. 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. The edge of the shingles should hang over a roof between an inch and an inch and a half or between a half inch and three quarters of an inch if drip edge flashing is installed. Roof overhangs can extend farther than 2 feet but beyond this length they begin to lose structural integrity and require external supports.

Some metal roofs have wood framed eaves that extend several inches or a foot beyond the house or shed wall to support metal roofing. 2 i call them the baker principles. Connect the water control element layer of the roof to the wall the air control element layer of the roof to the wall the vapor control element layer of the roof to the wall and finally the thermal control element layer of the roof to the wall. Too little can allow water to seep into rake or fascia boards.