Join Date: Feb 2010
Location: Narragansett Bay
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As mentioned, if you insulate, you have to keep the cold moist air from being able to get around the backside of the insulation. It will condensate there and mold will grow. Spraying it on, or sealing it against the hull are the only effective methods. However, I still don't think you can really conquer this one. It will find its way behind a cabinet or beneath a bunk. It's just a problem.
Are you at a slip with power? Personally, I think the only real solution is to run a dehumidifier.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.