Mast support problems are common on many older boats. Either they used steel that rusts over time (Cal) or they used wood which either rots from bilge water or deck leaks. Another common problem is the main chainplates and leaks into the cored deck from this area as all chainplates move a bit. And crushing of deck in the mast location again due to core problems. There should not be core under the mast but some boats do - the Hunter 27 being one. Bolt on keels need the filler at the join renewed periodically and this is common as well.
As far as repair costs, it depends on the extent of the damage and whether you will do this or a yard will. If you're reasonably handy it is not really complicated or expensive to fix either. On the other hand it's not hard to spend 5k to 10k or more to a yard for this kind of repair. Pictures would help showing the extent of work required. You need 10 posts to add pics or can link to a pic server.
Living aboard in Victoria Harbour
Last edited by mitiempo; 05-05-2010 at 02:46 PM.