Good morning Tina As you know, my name is Chris with Green pest solutions in today I came to treat your yellow jacket nest that was nesting in the roof edge of the fireplace surround outside. Once we talked and then you went in, I went ahead and treated it. Please stay away from the area for about 30 to 40 minutes And as I explained how the product works, but by late this afternoon pretty much the nest will be dead. They may be one or two coming maybe to try and get in there but definitely by tomorrow morning the nest will be dead. I left my business card in your front door for you. Have a wonderful day thank you for choosing greenest solutions as your pest control provider.