I am not sure if this is a plumbing problem but I have wooden floors in my basement and there is a small area that is starting to feel as if it is raised. It feels very hard and I am wondering if anyone knows who the proper people would be to call to look at this and check what the problem is. The area does happen to be next to the bathroom that we have down there which is why I am led to believe that it could be a plumbing problem. I don't see any leaks though. Could it be under the floors and I just can't see it? I am a new home owner and know nothing about construction and plumbing questions, so please help!!!