Black ants in house
I've got large black ants in the house. Probably carpenter ants.
Through this past winter I've gutted and remodeled the whole first floor of my old farm house. During the process, I saw ants. After ripping off the plaster and lathe in the dinning room, I discovered a lot of ant damage in what used to be the outside wall. I had put an addition on some time ago, making this an inside wall. I cleaned the area out and sprayed it with a commercial product. I saw no more ants through the construction phase of the remodeling.
Now, all of a sudden I've got queens appearing everyday. I've killed about 15 in the last two days. ... since it's gotten in the 90's. I did find one possible source in the addition, which I added. I put Terro in that area last year and thought it had taken care of them in that area. It is now active again.
My concern is: that there might be another source, which I can't detect. I'd like to get them taken care of before they eat the house up.
How can I track down their source? Then what is the best remedy and preventive?