At the place we rented before we bought this house there was a small deck at the side door. We almost never used it and I didn't even know about the wasp nest till an A/C repair guy came to work on the unit (beside the deck) and was swarmed. The nest was the size of a soccer ball! There were small gaps between the boards. I found a piece of thin molding leftover from a project which fit between the gaps. When it got dark I would open the door, stab open the nest and quickly slam the door then wait a couple of hours for them to settle down and throw a bucket of very soapy water on the deck. Within 3-4 days the nest was soggy mush and fell to the ground, some of the wasps were drowned/ soaped to death and the survivors moved away
