Carpenter ants do not build anything, they eat it down.
On a recent listing appointment I noticed ants, large ants around an outdoor shed.
I told the home owner that he had a major issue.
He disagreed. I bet him that if he took off one panel and there was no issue, I would give him $100 to fix the place he tore the board off. If I am right, he would give ME the listing.
I think I may have won the bet!