The fascia board on your house is the board that covers the rafter ends and is the board to which your gutters are connected.
It's important.
It protects your rafter ends from exposure to wet and therefore rot.
We hate rot.
As you can see from the top pic, installing the fascia happens way up high. Our boards were 16 ft long and had to be installed at the top of a second story.
By one guy on a ladder. Eric.
Soooo, the first thing he did was make a jig. Two, actually. It's a piece of plywood with a notch cut out to hold the board up while he nailed it in place. He screwed the jigs about 9 feet apart...
...and put a pulley between them.
Then we roped the board in the center and Eric climbed the ladder while I pulled up the board with him.
It worked brilliantly!
One thing we learned was to make sure the jigs weren't too high. If they were, then the boards wouldn't slip in easily and that was a pain teeter tottering the heavy board and trying to hang on to the ladder while getting it all steady and then lifting into place.
If you place the jigs a bit low, then the boards pop in fast and you can shove a few shims in the jig under the board to raise the board into place while you nail.
It does mean moving the ladder back and forth a few times and it's slow, but it allows one person on a ladder and one on the ground to do the work safely. Safe is good.
And now our fascia boards are on. They'll be covered with metal when the metal roofing goes on. Then the gutters can go on.