Roof Sheathing Overhang

If the top chords of trusses or rafters are warped or bowed install blocking to straighten.

Roof sheathing overhang.

A typical metal roof overhang may be 2 to 4 inches or even less. Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials. The inch thick boards extend from the eaves just past the exterior walls where they butt up against the plywood roof sheathing. Sheath one slope of the roof at a time ripping the top course to the needed width at the ridge.

1 by 8 boards commonly used on the eave and rake overhangs when soffits will not be installed rather than as roof sheathing. Nail the drip edge to the roof sheathing at roughly 18 24 spacing intervals using roofing nails. Draw a full scale mockup and snap a line with fascia in kind to figure out for the sheathing snap line swing the square over to the pitch of the roof in this case it is a. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.

When one slope is completely sheathed pop a chalk line down any slope edge as in a hip roof that needs to be cut at an angle. Position the first piece of plywood or oriented strand board sheathing on the bottom edge of the rafter tails at one end of the roof. The exposed edges of the 3 layers of rigid insulation are no longer exposed. This can be done with a straight piece of lumber 6 feet to 10 feet long or a long carpenter s level.

The boards are more attractive when viewed from underneath than rough plywood. Then we re going to use a scrap of 2x4 to space off the square and strike a line there. This indicates the truss tails. Box beam gable framing new gable overhang is framed in the form of a box beam hanging off of a new layer of roof plywood roof sheathing cantilevered over the top of the 3 layers of rigid insulation.

Trusses or rafters should be shimmed as necessary to provide a level nailing surface.