Hello. Very nice meeting you . Today I did your one time service for carpenter bees. I applied a liquid application under deck, around deck, around sun porch, and anywhere else holes were seen. I noticed most holes above windowsills on exterior. I sprayed into all those holes. Once they make contact with treatment they will begin to die off. Please allow 3-7 days. If activity still continues, please give us a call. Thank you!Agreement on file.Payment on file.