At our old house (we recently moved) the wasps and yellowjackets would build nests under the deck, and crawl up thru the cracks when you walked across the deck. That was the signal to go under the deck and spray them.

Here at our new house, we installed an AG pool. So the wasps and yellowjackets are constantly building nests under the coping. Easy enough to use "wasp spray" under the coping every few days, but now we're building a deck around the pool, and since the poll is dug into the side of a mild hill, we wont have room to get under the pool deck.

So ... how do you folks deal with wasps and yellowjackets?