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.

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. Run fascia the thickness of the plywood higher than the fly rafter on the gable and flush on the sub fascia. This would add another 3 4 to the thickness. I install the fascia flush with the top of the sub fascia.

Installed a new fully adhered membrane to the top of the old board sheathing prior to adding all that rigid insulation. Roof edge detail overhang extended to hide the thickness of the over roofing rigid insulation. I ve trimmed my roof sheathing to run between 5 8 and 3 4 over the sub fascia. We go in depth on how to install roof sheathing.

Installing the fascia before sheeting the roof solves a lot of problems. Starting with how to place the first row of sheathing we cover fastening methods the use of h clips stagg. 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. This opens the door to the possibility of water damage by letting gravity work.

Where should roof drip edge flashing be placed. But if you snap it at 40 inches then the sheathing will not project over the subfascia or true fascia. Most of the roof runoff is going off the roof not down the fascia board. This is to just enough to cover the 3 4 x6 actual 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.