I have an old basement that is 80% underground (on a slope). It's time to renovate 3 of the rooms. I will not dig outside and drain or anything like that for several reasons. No. 1 is that after the basement there is an entryway extension. The house is on a slope so there are no direct moisture problems BUT it's not completely dry either...
The times you notice moisture are during extreme rainfall 1-2 times a year. Then there are traces of moisture, but otherwise it appears dry.
What are my safe options for building a wall in front of the existing one? The quality of the existing one varies, ranging from old tiles, as shown in the picture, to ugly surfaces on mortar where the paint peels off and there is some salt efflorescence, which also indicates some moisture now and then. I'm absolutely not keen on plastering the existing old wall. I've done that before, so that won't happen for several reasons...
I would preferably like a completely new "freestanding" wall/surface.
1. Any good panel solutions? Can you set metal studs, no insulation, panel on the outside, or is that asking for trouble with moisture in the "air gap" that forms?
2. Concrete blocks, for example: https://www.bauhaus.se/lattbetong-plattor-50x400x600mm#go-to-description seem convenient. It's a bit unclear what the procedure is after putting up the wall though.
3. Concrete blocks in front of the existing one, like leca 90mm or similar... much more cumbersome... but it's not a large area so... plastering on a new leca wall I can live with but it's not the first choice...
The interior walls look fine, hard, and plastered, so they'll just be painted.
The interior walls in the picture would also be nice to just panel over. It's going to be like a fridge/freezer and a shelf in the room so thinking a little quick and dirty - the tiles that won't come off are as solid as a rock. And even if they're removed, it leaves a very ugly surface... (but maybe putty and painting will suffice)
