I always inform my sellers to disclose EVERYTHING about the property. It sure beats a potential lawsuit later down the line.
Never be discouraged from disclosing anything about your home. Buyers are unique and there may always be that one buyer that will accept a home with faults and all, because they just absolutely love the home.
So just disclose everything up front and im sure you will sleep better at night too!
Licensed Realtor in NJ and GA
As Andrew stated, full disclosure is always your best bet. Just consider how easy it is to bring a lawsuit against someone these days. You better believe if a buyer find problems after closing that they are positive you knew about, you are likely in for some legal action.