In the case of fiberglass boats, does most of the water absorption happen as a result of water inside the hull or exposure to water on the exterior of the hulls? I assume that it is more from water on the interior, where the fiberglass is not finished. But I have heard that even gelcoat does not prevent fiberglass from absorbing water.

Also, does anybody know how much weight a wood boat would gain when stored in the water? Traditional wood monohulls, and also modern wooden cats made with WEST system? Like, would a WEST system wooden boat absorb proportionally more or less water than a fiberglass boat?