If you feel that any of the following is the case--* a warranty is not being honored* losses were caused by negligent contruction or installation, or by willful "cutting corners" or misrepresentation* losses were caused by defective materials or manufacturing--then you may have a legal claim or cause of action against the contractors who made the installation and/or against someone in the supply chain (e.g. a manufacturer). To pursue your claim, you'd need to bring a lawsuit, if you can't work something out voluntarily with one or more of these potentail defendants. You should consult with an attorney to evaluate the strength of, potential worth of, and likely cost to pursue, a legal action.  Good luck. It is possible that it will turn out that the cost to litigate exceeds what you could recover.