Roof Sheathing Overhang

Then we re going to use a scrap of 2x4 to space off the square and strike a line there.

Roof sheathing overhang.

Sheath one slope of the roof at a time ripping the top course to the needed width at the ridge. 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. 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. A tapered piece of sheathing can be cut to fill in at the eave if necessary.

Align the long edge of the sheathing with the ends of the. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. 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. A typical metal roof overhang may be 2 to 4 inches or even less.

Trusses or rafters should be shimmed as necessary to provide a level nailing surface. The boards are more attractive when viewed from underneath than rough plywood. If the top chords of trusses or rafters are warped or bowed install blocking to straighten. This indicates the truss tails.

This can be done with a straight piece of lumber 6 feet to 10 feet long or a long carpenter s level. 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. Nail the drip edge to the roof sheathing at roughly 18 24 spacing intervals using roofing nails. The inch thick boards extend from the eaves just past the exterior walls where they butt up against the plywood roof sheathing.

The exposed edges of the 3 layers of rigid insulation are no longer exposed.