Roof Sheathing Over Fascia Board

Installed a new fully adhered membrane to the top of the old board sheathing prior to adding all that rigid insulation.

Roof sheathing over fascia board.

Gable end detail overhang cut and then rebuilt to hide the thickness of the over roofing rigid insulation. Installing the fascia before sheeting the roof solves a lot of problems. 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. We go in depth on how to install roof sheathing.

Most of the roof runoff is going off the roof not down the fascia board. Run fascia the thickness of the plywood higher than the fly rafter on the gable and flush on the sub fascia. Where should roof drip edge flashing be placed. I ve trimmed my roof sheathing to run between 5 8 and 3 4 over the sub fascia.

This is to just enough to cover the 3 4 x6 actual fascia. But if you snap it at 40 inches then the sheathing will not project over the subfascia or true 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. This opens the door to the possibility of water damage by letting gravity work.

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. This is a known issue that is directly caused by capping over the fascia instead of doing a proper job and replacing it. I install the fascia flush with the top of the sub fascia. Starting with how to place the first row of sheathing we cover fastening methods the use of h clips stagg.

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.