We have chosen “OSB platte” 12mm as our inner wall. It is not only cheaper but also very good in preventing moisture. Before we putting up the wall, we have put on a tape from inside where the framing woods (KVH Holz) are.

For the side where the wiring is, after putting the black tape, we have added a layer of wood on top before putting up the “OSB platte”, so it creates some space for all the cables between “Dampfbrense” and the “OSB platte”