Oh, those darn wasps/hornets seem to get in everywhere and anywhere! We've had them in our siding, they plug up the hoses and other stuff with mud, and a couple of years ago we had 2 big hornet nests, one in a hidden spot in the greenhouse and one under our deck, that we had to get rather creative to get rid of... I don't mind a bit if they want to live in the woods, which we certainly have plenty of, but really just can't tolerate them when they try to keep me out of the GH or attack people and pets on the deck!