I moved into a house 3 years ago. At the time, the home was 11 years old. The first October we were in the new house, we noticed alot of wasps inside the house--red ones, black ones, and yellow/black striped ones. They seemed to be most numerous in October, and then got less and less common as year progressed. We've had the same problem for three years now--lots of wasps (different varieties) in October, and less in the ensuing months. I've walked around the outside of the house to see if they are congregating/coming in at a particular point, but haven't had any luck; nor have I actually seen where they are getting in from the inside.
Any ideas on how to stop this?