How Far Should Roof Sheathing Overhang

The roof sheathing comes down and ends on top of the 1 x fascia.

How far should roof sheathing overhang.

This is to just enough to cover the 3 4 x6 actual fascia. This indicates the upper edge of the first row of roof sheathing leaving enough overhang that the subfascia and fascia will tuck neatly underneath when the time comes. Too little can allow water to seep into rake or fascia boards. I ve trimmed my roof sheathing to run between 5 8 and 3 4 over the sub fascia.

Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. Nail the drip edge to the roof sheathing at roughly 18 24 spacing intervals using roofing nails. Measure up the rafter 45 3 4 inch from the cut end of the truss tail and snap a line along the trusses.

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. The edge of the shingles should hang over a roof between an inch and an inch and a half or between a half inch and three quarters of an inch if drip edge flashing is installed. Roof sheathing overhang on fascia. Then i do a metal drip edge to cover it all.

It is at 45 3 4 in. Now that i ve modeled what i was going to build i decided i need a piece of molding to break up the plain look of just the fascia trim plank. A typical metal roof overhang may be 2 to 4 inches or even less. That said overhangs can extend as far as 2 without the need for external supports.

Slide the sheet one rafter width over the end of the roof so the edge is centered on the next rafter offset one rafter spacing from the first piece of installed sheathing from the row below. On my shed my sheathing does not protrude actually how both my house and shed are done is a 1 x 6 house 1 x4 shed fascia is installed to end of rafters then 1 x 1 1 2 is tacked onto the fascia at the top.