Just doing the cargo floor for now. I've got some dodo mat sound deadening sheets for when I get on to the sides and roof. Good point about the light (not that I've wired one up yet). Want to get the r&r bed bolted in properly once I've got the floor sorted.
Use WBP plywood/MDF or better, bonded with a waterproof glue, then at least it wont start delaminating the instant it rains on it, or your backside knocks a mug of coffee off the table.. . I would have recommended marine plywood but decent quality plywood is now very expensive, the cheaper marine ply is made out of loosely bonded splinters: the glue is waterproof but the wood is rubbish.
I agree with mike, old style marine ply was great, the modern stuff is rubbish, even the really expensive stuff. MDF no way. I don’t know but a local guy ( very good ) has a business converting new VW vans. I have seen his internal units and they are are lightweight and brilliant…UPVC or similar. . I am sure there must be a similar lightweight sheet that is impermeable with the benefit of sound insulation. Just a thought
You can get exterior grade MDF. Its used in boat building inside cabins. I was surprised by its use on luxury yachts when I went on a Discovery Yachts factory visit once but they said its waterproof enough. Just for the record, my bus has a sheet of 6mm reused MDF with Flotex lino/carpet over it. I was given the MDF and spent £110 on the carpet. 11 years on, no damp issues.
