Most of the roof runoff is going off the roof not down the fascia board.
Fascia plywood roof.
Making the tops of your fascia boards the same angle as the roof allows you to easily place roofing material over them without creating bumps or ridges.
Soffit materials are similar and also include plywood.
Fascia and soffits finish the edges of roofs by covering the ends of the roof rafters or roof trusses where they overhang the sides of the house the fascia is the wide board that s installed on edge and runs horizontally along the edge of the roof.
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.
Measure from the edge of the plywood outside of the wall over to whatever the overhang will be and square a line up to indicate the end of the truss tail.
This is to allow for adequate roof cavity ventilation.
Where should roof drip edge flashing be placed.
Rip the tops of the fascia boards to match the slope of your roof.
Add an inch and a half for subfascia strike a line.
Rafters run from the peak of the roof.
Redwood and cedar are common materials because they are rot resistant.
The minimum plywood for roofing.
Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component.
This plywood deck which covers the entire roof provides a perfectly straight surface for the shingles to be applied.
Add the thickness of the true fascia 15 16 in in this case.
You can also buy pvc and composite fascia or vinyl or aluminum fascia covers for wood.
Its top edge is tucked up under the shingles and its outside face is where the gutter is mounted.