Thank for response halekai36! I looked at C30 association and they say that boats after 1988 have non-wood mast step support. Is that that you mean by "NO plywood laminated into the keel stub"? Or they actually have plywood to support the keel????
This is a big problem MOTS C-30 owners are not even aware of. Catalina will even send you the new lamination schedule to do this repair!
There is plywood laminated into the keel stub as in the picture below! I'm not talking about the mast step but the area sandwiched between the keel bolts and the keel.
While wood has it's utility in decks it has NO place being laminated into a keel stub where it will be surrounded by water from both the ocean side and the bilge side!!!!
P.S. Max may be the C-30 tech editor but having done this repair I can assure you he is WRONG about the thickness of the glass in the bottom of a C-30 (at least on my specific boat he was and is very wrong)! I've seen it touched it felt it ground it and sanded it and I can assure you it is NOT 1 inch thick.
Think about it? If it was an inch thick they would have had NO need to laminate plywood into the stub!!! I wish I had owned a digital camera when I did the repair on my C-30's keels stub.
Again my advice is certainly worth what you paid for it but I've been there, repaired this problem and feel it my duty to suggest to those looking at buying a pre 1988 Catalina to do a full keel stub examination BEFORE purchase to ensure it is DRY!
I'm in no way trying to dissuade anyone from buying a C-30, they are great boats, but please do so carefully and with full knowledge of what may lie ahead!
DISCLAIMER: This photo is NOT a C-30 but rather a Pearson 26.
My Catalina 30's keel stub was built very similarly to this photo although slightly more robust in the glass thicknesses!
Delamination from the plywood: Note how easily the fiberglass skin peeled away from the plywood!
The sandwich construction method!