@Patty18 : "My inspector didn't note anything so this is my fault, my problem!!"
That can not possibly be true! You are no expert, so you hired him because he is! It was his negligence that led to this problem, for not seeing thru the lies everyone else is telling. As an inspector, he must carry insurance to pay for mistakes like this. This is like taking a used car to an inspector, who fails to tell you what's wrong with it before you buy it.