This simple jig provides the required 1 1/2" raised fascia
height. The tile rests on the outer rim of the plywood. Tack two
jigs to the deck at a rafter location suitably spaced for the
length of the fascia to be installed. Slit the plywood at 10"
from outside of fascia location. Raise the fascia and plywood
until it touches the jig and nail in place.