Personal take. Sealing things off is a two edged sword. My experience with that is more on the dirt home front.
A few dirt home houses ago I moved for job reasons, and decided to build. A hot new-ish thing then was the exterior siding in Dryvit, the synthetic stucco. Coupled with stone in some sections for accent, I liked the look back then.
I learned a lot watching the installation, this being pre-internet when research resources were harder to come by. So you have the structural walls, with insulation between the studs. On the inside you have drywall, taped and painted, and even foam insulation spray in and around electric plugs. Then going outward you have 4x8 plywood with taped and sealed seams. On top of that then goes about half inch styrofoam with sealed seams, and on top of that goes the Dryvit coating that is itself air tight. You have layer upon layer of air tight construction.
When I moved in I was delighted. It was so incredibly tight and thermal controlled. My heat bill was as close to zero as one can get.
But a few months in I'm going back to the contractors. Is there any such thing as a heat exchanger system for residential use, like is standard in sealed highrise offices to constantly bring in fresh air? Their look was deer in the headlights. Never heard of that in residential. Nope, nothing exists.
Middle of the winter I found myself opening windows to air the place out. Stale air. Humidity. Just needed more oxygen. It was living inside of a balloon.
Cutting out some chapters in the story to cut to the chase, the problem with that construction was houses built that way rot from the inside out. Normal life creates humidity and there is no escape. A half dozen years later I'm selling for another job move and I too had one small area an inspector found a problem in.
I understand the appeal of wrapping. I also lived with the effects of it. New build, first winter for me. I was shocked to see the cost of a wrap. It would have not quite doubled my yard winter storage costs. But worst is to pay that price and then battle the internal problems.
I am now trying to finally complete the renovation of a 120 year old home. Much more drafty than new ones. So the winter problem is everything dries out bone dry.
The usual response to such stuff is "it all depends on the installation." Right. And my retort is, then I guess I just have a talent for having the wrong installers.
You have taken a boat that was already probably pretty tight, as boats are built to be. You then tighten it. Condensation is unavoidable. And it gets raised in out of the way spots you can't see.
If the point of it all is to protect gelcoat and make spring cleanup easier, I'm going to experiment with a different route next season. I ran out of time this season and could not possibly get there. As I was about to haul I was told of a wax product you use in a hose end sprayer kinda like those cannisters for garden fertilizer. Give the boat a fast cleaning, then spray the whole thing down with that wax whose only mission is enough protection to ease things in the spring. Not designed to replace normal wax jobs.
I can't use heaters or dehumidifiers in my yard. The buckets of stuff that dehumidify have limitations. I'm not wrapped. When next near the boat at Christmas I'll be swapping out the buckets for fresh ones, and really hope to find a really dry air day to just open it up and dry it out that way with fresh dry air, every cabinet door and drawer and hatch wide open.
My two cents
