How Much Overhang On Roof Sheathing

I ve trimmed my roof sheathing to run between 5 8 and 3 4 over the sub fascia.

How much overhang on roof sheathing.

Measure up the rafter 45 3 4 inch from the cut end of the truss tail and snap a line along the trusses. However the suggested width of an overhang is between 12 and 18 for eaves and no more than 8 for rakes. This is to just enough to cover the 3 4 x6 actual fascia. Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Also note that a new fully adhered membrane is installed on the original roof deck replacing the one installed 17 years ago is folded down to catch the top edge of the wall water control layer. Never attach roof sheathing with staples. The typical thickness range for sheathing is 3 8 to 3 4 inch.

Sheathing should be a minimum of 19 32 inch thick. Then i do a metal drip edge to cover it all. 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. Over roof insulation the gable overhang has been cut flush with the wall sheathing.

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. 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. 8d ring shank nails should be used instead. Overhangs can vary from a few inches to a few feet depending on preference.

It is at 45 3 4 in. 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.