Does anyone know if they make a bee repellent that you can spray on decks and gutter areas that will prevent nesting?

We get a lot of wasps up on the roof. Now and then they make their way around the decks.

The little guy got stung last year at camp. He's a little gun shy this year. I'm a little irrational about them as well.

(Thank god I chased off a HUGE snake yesterday before he saw it. He'd never go outside again.)