vapor barrier

So I got a single skin outhouse with a dpm below concrete and I’ve tanked it for good mesure. Plan was to 2x1 batten out walls at 400mm apart with a dpm strip behind & not touch the floor with them. Then 50mm PIR celotex over the top to create a small cavity (taping joints) then foil back...

Hello, I bought a wooden cabin/house in Sweden around 70 sqm (750 sqft) and am now renovating it… I’ve read a lot of things about vapor barriers and understand I should definitely do this for the walls and ceilings as I’m changing those anyway. But when it comes to the floor I can’t seem to...