Skip, A few of observations:
1. It is unlikely that the brown film under your deck is core related. In my own C&C Corvette that film was emanating from the micro-balloon based fairing compound that was used to fair the underside of the deck, since, like your boat, the Corvette does not have a head liner. It was a dusty and dirty job to grind all that old fairing compound off and refair the underside of the deck with West Epoxy fairing compound, but since then it has been trouble free. 2. There is an excellent two part article on deck core repair and replacement in the last two issues of Good Old Boat magazine. Well worth reading, as is the whole magazine. I can say that because I'm a Contributing Editor, although I subscribed to the magazine well before that. 3. Hire a good surveyor (preferably SAMS or NAMS accredited) to tap and run a moisture meter over the deck to really determine the extent of the problem. 4. If core needs to be replaced, it should be replaced with new core, not solid glass, New balsa can be used, as long as all openings and fasteners are isolated from the core and all the kerfs in the core are filled with resin. That applies to foam cores as well. If foam it should be a minimum of 5 Lb. density. Rob On Thu, Jan 15, 2015 at 9:25 AM, Burt Stratton via CnC-List < [email protected]> wrote: > I have resigned myself to the fact that I need to address my decks and > cockpit sole. The PO installed wood strips fore to aft on the cockpit sole > ostensibly to provide some lateral traction. They were not properly bedded > and as you might imagine, the wood strips did not last long. There are open > screw holes and if I step next to them water comes out. That is an obvious > problem. > > > > The reason I am concerned about my decks, particularly my cabin roof is > the fact that a brown wet film will form over time on the inside of the > cabin roof. My roof has no headliner. The paint was peeling badly when I > bought the boat and I have stripped it off. If I clean the fiberglass and > wait a few days the film gradually appears. My assumption is that there may > be a wet core in the roof. I will get a surveyor to take readings with his > moisture tool to confirm but assuming that is the case, I would appreciate > any insight by listers who have tackled this problem. > > > > I am not an experienced fiberglass guy. I don’t particularly like working > with fiberglass but I am pretty handy otherwise and would be willing to > attempt this work in order to save a few hard earned bucks. > > > > Here are a couple specific questions: > > 1. What would the balsa typically be replaced with? An appropriate > thickness of mat? > > 2. Should I attempt to save the fiberglass skin I remove to be > re-used or just use new fabric to glass over the repair? > > 3. Assuming I work from the inside, how do I defy gravity to keep > the new mat or fabric from falling down until it cures? Does the resin have > enough mastic properties to keep it up? > > > > It is starting to look like the coming season may be lost for me. I have a > lot to do and can’t do most of it until the temps increase. I do want to > rehabilitate this boat and do it right. I think it will be worth it whether > I keep the boat or sell her when I’m done. The boat is covered so I am > hoping it will dry out a bit before I start. > > > > Thanks as always > > > > Skip > > 1974 CNC 33 3/4tonner > > On the hard in Walpole, MA > > _______________________________________________ > This List is provided by the C&C Photo Album. > > Please donate to the C&C Photo Album to keep this list free for all > subscribers. > > Email address: > [email protected] > To change your list preferences, including unsubscribing -- go bottom of > page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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