Roof Sheathing Overhang

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.

Roof sheathing overhang.

To stabilize the rafters support the roofing material and hold the entire roof together roof sheathing is installed. Sheath one slope of the roof at a time ripping the top course to the needed width at the ridge. Roof sheathing basics the skeleton of a roof is formed with rafters or trusses generally spaced 16 inches or 24 inches apart from the center of one rafter to the center of the next. The exposed edges of the 3 layers of rigid insulation are no longer exposed.

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. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood. Add the thickness of the true fascia 15 16 in in this case.

Roof sheathing or decking is one of those elements. 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. Align the long edge of the sheathing with the ends of the. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof.

Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. Measure from the edge of the plywood outside of the wall over to whatever the overhang will be and square a line up to indicate the end of the truss tail. 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. Add an inch and a half for subfascia strike a line.