Having read the numerous other complaints posted on this site we find ourselves joining in. We are experiencing the same issue with our K&K windows - sashes rotting away. We are in WI and have found several others with the same situation. We are told by the company doing our replacements that the cause of this problem is a manufacturing error - factory should have put a silicone seal on the outside of the window where the glass meets the frame - they did not and therefore over time water can run down and penetrate the wood behind the frame. Seems the manufacturer's standard reply is to tell us, the consumer, that we have not properly sealed the wood portions of the windows - well in this case there would be no way to seal the wood BEHIND the outer frame and that is where the problem begins. It appears that windows manufactured between approx. 1996 - **** are experiencing this epidemic flaw. We are very interested in seeking restitution from the manufacturer and would appreciate receiving any additonal informaiton regarding this. Is there a class action suit in process? If so, how do we become a part of it? Thank you for any information you are willing to share.