Report: we've already spent 2 months in the gray, mild damp of southwest England. Yesterday I was down under the bed (looking for a lost item) and staring at the walls near the floor. Our conversion is insulated with ezcool, thinsulate and reflectix, topped by 1/4 ply sealed on both sides with 3 coats of marine polyurethane. We keep the van warm with an Espar D2, and often but not always run our exhaust fan overnight when sleeping.
There is extensive condensation and even a little mold down there. The wooden walls down near the floor are cold enough for condensation to form on them; ditto for the batteries and everything else near the floor level including a very small part of a wheel well that was left un-insulated (covered in QuietCoat but no thinsulate).
Hopefully, southern Spain for 6 weeks will be enough to get us dried out.
On reflection I should probably have used the D2 to drive an air delivery system that actually heated the lower part of the van more extensively.
Still, the level of damp in the UK is something you have to see to believe. If things can survive this, they can survive anything, I suspect (maybe the tropics would still be an issue).
There is extensive condensation and even a little mold down there. The wooden walls down near the floor are cold enough for condensation to form on them; ditto for the batteries and everything else near the floor level including a very small part of a wheel well that was left un-insulated (covered in QuietCoat but no thinsulate).
Hopefully, southern Spain for 6 weeks will be enough to get us dried out.
On reflection I should probably have used the D2 to drive an air delivery system that actually heated the lower part of the van more extensively.
Still, the level of damp in the UK is something you have to see to believe. If things can survive this, they can survive anything, I suspect (maybe the tropics would still be an issue).