Roof Sheathing Overhang

Sheath one slope of the roof at a time ripping the top course to the needed width at the ridge.

Roof sheathing overhang.

A tapered piece of sheathing can be cut to fill in at the eave if necessary. The exposed edges of the 3 layers of rigid insulation are no longer exposed. 1 by 8 boards commonly used on the eave and rake overhangs when soffits will not be installed rather than as roof sheathing. 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. 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. This indicates the truss tails. Then we re going to use a scrap of 2x4 to space off the square and strike a line there.

This can be done with a straight piece of lumber 6 feet to 10 feet long or a long carpenter s level. 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. If the top chords of trusses or rafters are warped or bowed install blocking to straighten. Trusses or rafters should be shimmed as necessary to provide a level nailing surface.

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. 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. The boards are more attractive when viewed from underneath than rough plywood.

Points to the installation of ice and water shield along the lower roof eaves protecting against ice dam leaks that are common on un vented roofs in cold weather or snow climates.