i just used the over the counter stuff and i did find two boards that were touching dirt and they had termites but i haven't seen any for a few months. I think every house has termits the guys that own the companies make a living off stressing you out. Termites have been around millions of years and you only kill the termites that are in your house when it is tented. Once the tent is taken down they can come righ back in....so i stopped stressing and took as much pro active action as i could, no dirt to wood contact, stakes, sprays.....haven't seen anything yet!