Hello.
I'm about to start renovating another room in our house. I have renovated a room before and used porous fiberboard and plasterboard. The house is plastered on the outside of gray concrete blocks (I think). A house from -49 on Gotland. I chose not to add insulation or plastic since I've heard from others that it can create moisture problems. I'm happy with the result but thought I'd check on the forum if there are people with different opinions or deeper knowledge that could be beneficial for the next renovation.
/Daniel