Fascia Board Purpose

https://fasciareplacementspecialists.com/Protecting the fascia board
One way to protect the fascia is to install a drip edge, which is an L-shaped piece of metal that is nailed into the roof’s decking. It sits below the first layer of shingles and deflects water away from the fascia board.
“It goes around the fascia board and protects the area from rot and from water going up and under your shingles. “We highly recommend installing it.”
A metal drip edge should be a part of all roof installs, but warns that some roofing contractors will not install them as a way to cut costs.