Good afternoon Jeff. Today I completed your one time service for yellow jackets. Upon arrival I saw active yellow jackets flying on and out of the eaves by the back window. I also saw them flying in a void by the eaves and where the roof meets. I applied a liquid treatment to both voids. Please be careful. The yellow jackets are agitated and will sting. Please allow 10 to 14 days for our products to take effect. Thank you for choosing green pest solutions. Have a great day!