Re: I-28 Vinyl Headliner Replacement
I have some what of an answer to the condensation issue. I ask this of the guy who has done several restorations of my auto headliners, they too tend to sweat. He stated, if you use vinyl, does not breath, it has to be the perforated vinyl lik you see in the older cars. If you use cloth as the material for you headliner, it breaths and does not need the small holes. So, I'm guessing Islander put the foam under the vinyl, as you stated, to absorb moisture because the vinyl was not of the perforated type.
So, when I do my headliner, I will be using headliner cardboard, foam, then cloth. I will glue the foam to the headliner board then glue the cloth to the foam. I have posted some pictures of one of my car headliners, he also did my door panels the same way. Obviously, the headliner in the boat wont have the rods, but I plan to use 1 1/2 batons.