As the man said, call and get an inspection. They can eat you out of house and home- literally. And faster than you would think. Back in the day, there were soil treatments such as Chlordane that lasted about as long as Plutonium- but that was bad for the environment- so the products used today do not hurt the spotted owls and snail darters- but do not seem to last as long.
What we have here is... failure- to communicate.