We have a 1977 Catalina 30, which we have enjoyed with few problems for the last 10 years in a three family partnership. This year our insurance company required a new survey of the boat. The surveyor reported that there were very high moisture readings in the cabin top, around and in front of the mast step, along the sides where the windows are and some high readings in portions of the side decks. He also said that soundings indicated some significant core delamination in several areas. However, there are no external signs of deck flexing or cracks in the gel coat. Even under heavy load, everything seems very solid. To repair this problem we apparently require extensive portions of the deck removed, the rotted core material replaced, and the deck surface reinstalled and refinished. We had an estimate for these repairs which was about $25,000 CDN. This is equal to the value of the boat and it does not make any sense to put that much money into it. We would like to hear about other peoples experience with this problem on an old Catalina boat. We would also like advice on alternatives to the repair that we can do ourselves and which would be much less expensive, or any alternative course of action someone could suggest. We have been happy Catalina owners and would like to continue to enjoy our boat without having to spend a fortune to repair it. Thank you for any help you can give us. Bill