How Much Should A Roof Overhang

This shed has a large overhang to the front to provide shading and protection from the rain.

How much should a roof overhang.

Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials. It is at 45 3 4 in. Measure up the rafter 45 3 4 inch from the cut end of the truss tail and snap a line along the trusses. 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.

You can add 3 to 5 inches to the top. Too much overhang and the shingles could blow off in high winds. A typical metal roof overhang may be 2 to 4 inches or even less. Shaded area in front of the shed to keep the interior of the shed cool will be much larger.

If you do not have a drip edge flashing installed shingles should overhang an inch to an inch and a half. This will keep rain away from your shed. Roof overhangs can extend farther than 2 feet but beyond this length they begin to lose structural integrity and require external supports. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.

This indicates the upper edge of the first row of roof sheathing leaving enough overhang that the subfascia and fascia will tuck neatly underneath when the time comes. That said overhangs can extend as far as 2 without the need for external supports. However the suggested width of an overhang is between 12 and 18 for eaves and no more than 8 for rakes. This will protect a roof from most types of damage.

How much overhang should roof shingles have. The ideal shed roof overhang depends on the purpose of the overhang the location and microclimate of the building. If you have installed a drip edge flashing you should have between half an inch and three quarters of an inch of shingle overhang. To create a cantilever properly you will need to know plenty about physics like torque and rotational equilibrium.

Two feet is the general maximum length for a typical roof overhang.