Join Date: Feb 2000
Location: Annapolis, Md
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My experience with teak decks is a bit different than your own. In my experience, teak acts like a thermal flywheel, absorbing the energy of the sun and re-radiating it out of phase. In other words, in the morning when the boat would be warming up, the teak is absorbing heat, but due to its insulative qualities, that heat does not make to the interior immediately, but due to its density it re-radiates that heat later in the day, so early in the day, when that heat is desirable it does not make it into the interior. Later in the day, that heat is re-radiated into the interior when the boat is at its hotest. Measured in the morning teak decks would be cooler.
Since teak is darker than most deck finishes, it absorbs more heat than a boat with cored composite decks and so measured late in the day, when the boat is at its hottest, and its time to make dinner, teak decks result in a noticably hotter interior temperature.
My comment on Beneteau's teak decks is based on observations of local Bene's with teak inserts which look really beat (warping and curling loose from the glass below) after roughly 10 years of use in our climate where boats remain in use year round and are exposed to weather both winter and summer.