An insecticide treatment typically takes about 30 minutes to 2 hours per room depending on size and condition of the room. Once the treatment is complete you should wait until all the insecticides have dried before reentering your home, or until the PMP says it is safe to re-enter.
Do you have to leave when they spray for bed bugs?
To keep them safe, move them away from windows and walls. You must leave your home, before treatment starts. Stay away from your home for a minimum of 4 hours.