It usually takes two people to hang fascia boards. Even then it can be pretty precarious out there on the end of a rafter, straining to support a heavy fascia board with one hand, while trying to line up a mitered corner and sink a galvanized 16d nail with the other hand. With the help of the simple jig in the drawing, even one person can do it.
I tack one jig near each end of the fascia. I drive the nails just far enough to support the weight of the fascia. Then I lower the fascia into the slots in the jigs (the slots should be a little oversize to prevent binding). The jigs hold the fascia in approximately the right place while I adjust it for alignment and nail it in place.
Neal Bahrman, Ventura, CA
Edited and Illustrated by Charles Miller
From Fine Homebuilding #53