The woodpecker on the metal building is a seasonal mating thing. They like to make as much noise as possible to attract a mate. Same thing happened to me. I had a thermometer on my fence, and every morning at dawn, the woodpecker would be there, DING DING DING DING DING! It was so bad one morning I stormed across the yard with my robe, doing the full-on crazy old man yelling at the wildlife routine. I was probably still in my 20s, lol.
The good news: it will stop soon. He will either find a mate, or give up.