Join Date: Mar 2006
Location: New England
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It isn't really delamination but deformation. IMHO, foam-cored decks should never be painted dark colors, especially if the laminate uses epoxy resin. The foams and the epoxy resins tend to soften with elevated temperatures... which is one reason I prefer decks cored with end-grain balsa.
A dark-colored deck, say navy blue, can probably exceed 150˚ or more on a hot summer day. Depending on the construction of the deck, it may soften enough to deform permanently. One one boat I know of, that had a foam-core deck and was made with fiberglass, kevlar and epoxy composite, the deck deformed and you could see one of the crew's footprints in the deck material afterwards. Granted, the crew member in question is a huge guy, about 300 lbs... and he was carrying a cooler filled with ice, beer and soda at the time..
Several of the companies that make epoxy-based composite rudders and such have warnings about painting them in dark colors for just this reason.
If the deck is polyester or vinylester resin... it would take some really wicked sun to do this..since they deform at much higher temperatures than most of the epoxies do.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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