Good afternoon this is David with Green Pest Solutions. It was nice meeting you. I completed your one time service for bees. I applied a non repellent solution to the opening in the siding where the chimney attaches to the house. This is a residual solution that will continue to work for several weeks. As the wasps enter and leave the opening they will contact the product and gradually be eliminated. Please allow 2 weeks for optimal results with this treatment. If you have any questions or concerns please feel free to contact the office. Thank you for choosing Green Pest Solutions.