I am busy reworking the interior
of my boat
This is how far along I am....
in place is polystyrene - approx 25-30mm thick. Its been there many years. The plastic sheeting is telling because polystyrene absorbs water
moisture - the plastic sheeting must be there as a vapor barrier for this reason.
Not related to boats, but I have been in a fish
room (full of aquariums) that had its ceiling lined with polystyrene sheets
and the stuff was falling out of the ceiling because of the weight of the water
it had absorbed in that damp environment
. Ok our boats are not likely to see that sort of moisture but the point is the stuff does absorb water pretty readily.
Ok so I need to replace it. But with what? A closed cell foam of some sort I would think - but what material? I would like to stick to 20mm thick if possible so that I can leave a small air gap between the insulation
and the ceiling panels
is Aluminium. The roof of the coach house/saloon area is Aluminium. A good conductor of heat.
Any suggestions on what to use for this ?