I have a door in the basement section installed in a rather deep "niche" on the inside. Initially, I had plastered walls in the niche, but after a window/door replacement, it was so damaged that I put up boards inside the niche.
The drainage on the outside is just Platon, so some moisture seeps through the wall (400mm ytong).
The first attempt was regular MDF boards (with plastic on the back), but after a while (several months), the paint (silicate paint) became discolored in certain spots (2 patches about 5-8 cm).
A new attempt with wet room boards (Jackon) instead, but now they have also started to lose paint in the corners near the door and have become slightly discolored.
Somewhere there seems to be a greater moisture concentration, but no traces of liquid water or black mold or similar.
I am now considering using fiber cement boards and plaster paint to see if they would handle the moisture penetration better.
I can't manage the plastering because then I would first have to cast/build up a lot since the hole is "destroyed" after the door replacement...
The drainage on the outside is just Platon, so some moisture seeps through the wall (400mm ytong).
The first attempt was regular MDF boards (with plastic on the back), but after a while (several months), the paint (silicate paint) became discolored in certain spots (2 patches about 5-8 cm).
A new attempt with wet room boards (Jackon) instead, but now they have also started to lose paint in the corners near the door and have become slightly discolored.
Somewhere there seems to be a greater moisture concentration, but no traces of liquid water or black mold or similar.
I am now considering using fiber cement boards and plaster paint to see if they would handle the moisture penetration better.
I can't manage the plastering because then I would first have to cast/build up a lot since the hole is "destroyed" after the door replacement...