Roof Sheathing Over Fascia Board

Chalk your line up the rake 48 from the point where fascia meets sub fascia.

Roof sheathing over fascia board.

During house construction fascia boards are fastened to the ends of the rafters called rafter tails before the roofing and gutters are installed sometimes there are two fascia boards either the same width or different widths with a narrower board in front of a wider board and sometimes fascia is installed over a board of framing lumber called subfascia that mounts directly to the. 4 reduced roof tile overhang by capping over the boards the guttering will be set slightly further away from the roof tiles this may cause rain water to run behind the gutter rather than into it. Gable end detail overhang cut and then rebuilt to hide the thickness of the over roofing rigid insulation. I install the fascia flush with the top of the sub fascia.

Then i do a metal drip edge to cover it all. Click to enlarge any image our illustration above shows proper placement of the roof drip edge atop the roof sheathing before installation of roofing felt or ice and water shield and spaced a bit away from the fascia. 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. Most of the roof runoff is going off the roof not down the fascia board.

This would add another 3 4 to the thickness. The roof sheathing comes down and ends on top of the 1 x fascia. Draw a full scale mockup and snap a line with fascia in kind when sheathing a roof the first step is to snap a line so that the first row goes on straight. Roof edge detail overhang extended to hide the thickness of the over roofing rigid insulation.

Installing the fascia before sheeting the roof solves a lot of problems. I ve trimmed my roof sheathing to run between 5 8 and 3 4 over the sub fascia. This is a known issue that is directly caused by capping over the fascia instead of doing a proper job and replacing it. This is to just enough to cover the 3 4 x6 actual fascia.

Run fascia the thickness of the plywood higher than the fly rafter on the gable and flush on the sub fascia. 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. Installed a new fully adhered membrane to the top of the old board sheathing prior to adding all that rigid insulation.