Roof Sheathing Overhang

1 by 8 boards commonly used on the eave and rake overhangs when soffits will not be installed rather than as roof sheathing.

Roof sheathing overhang.

Then we re going to use a scrap of 2x4 to space off the square and strike a line there. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. 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. Sheath one slope of the roof at a time ripping the top course to the needed width at the ridge.

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. The boards are more attractive when viewed from underneath than rough plywood. The inch thick boards extend from the eaves just past the exterior walls where they butt up against the plywood roof sheathing. 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.

If the top chords of trusses or rafters are warped or bowed install blocking to straighten. Align the long edge of the sheathing with the ends of the. A typical metal roof overhang may be 2 to 4 inches or even less. The exposed edges of the 3 layers of rigid insulation are no longer exposed.

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. Nail the drip edge to the roof sheathing at roughly 18 24 spacing intervals using roofing nails. This indicates the truss tails. A tapered piece of sheathing can be cut to fill in at the eave if necessary.

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