Renovate interior bathroom walls

Hello forum,

I want to renovate a bathroom, but I have the problem that I have two exterior walls here that consist only of 24 cm brick walls without further insulation. Actually, that means only one, in front of the other is an 8 cm Styrofoam insulating facade. The walls were internally covered with sauerkraut board. I have now torn this down and now have two crooked, uneven walls. How could I most cleverly get nice, straight walls that I want to tile up to three quarters of the height? Simply put a lightweight wall of green drywall in front? Only with ventilation or with insulation and vapor barrier? If so, which insulation? Or just put a 7 cm Ytong wall with a 2 cm air gap in front? Or simply just a lime plaster? Or ... or ... or? Additionally, the bathroom is actually only used sporadically, we have a second one. It is therefore only minimally heated and a condenser dryer is also supposed to be there. So actually the ideal conditions for mold. I am grateful for good advice.

Best regards Joe´s Mercur

Hello,

if the bathroom is not used constantly and there is also moisture from the dryer, I would use calcium silicate boards, these can absorb moisture and also release it again, making them best suited for mold prevention.

jup

I see it exactly the same way

Since it fits so well right now: Can the panels be laid directly on plaster (glued, screwed?) and then wallpapered + painted? We have tiles from the floor up to 30cm below the ceiling, above that it is starting to turn gray... However, the exterior wall is insulated (blown in)... Regards, Daniel

Hello,

...Our walls are tiled from the floor up to 30cm below the ceiling, above that it is starting to turn gray... However, the exterior wall is insulated (blown-in)...

There could be various reasons for this. Too high humidity and/or too low surface temperature of the component. It is also conceivable that there is a thermal bridge. It would not be uncommon for blown-in insulation to leave an inhomogeneous distribution of the insulating material.

Best regards.