Has a house built in '63 with a rec room.
The old floor has been removed, it was on wooden joists with pressure-treated spacers and fiberglass directly on the relatively uneven slab. The room has so far been severely inadequate in terms of ventilation, and the slab showed signs of moisture when dismantled.
The walls are also insulated from the inside in the same way as the floor but with painted panel on the outside.
One radiator, larger model (over 5 m long) connected to geothermal heating, is currently responsible for heating.
In January, we drained around the house and insulated with Pordrän all around. One of the walls in the basement, however, faces a larger conservatory, which is why it has not been addressed from the outside (I know it would have been optimal, of course, but that's the fact). On the inside here, there is an extra brick wall as an "inner wall".
Now the floor has been "clean" for two weeks and is no longer damp (just cold).
Now to my idea for which I welcome tips
1. Mechanically ventilated floor from Nivell.
2. Remove existing wall insulation from the inside, put up steel studs, and new cladding of the right character.
3. Cut out joints at certain distances on the "brick wall" to allow the underlying basement wall to breathe even better, and paint the wall with the right paint concerning diffusion properties (idea from Anticimex).
4. Remove the existing radiator + also the radiator in the basement hall and instead install a smaller air-source heat pump for a constant right temperature in the room (Laundry room renovated in 2014, drilled and heated with waterborne underfloor heating).
5. Ventilation via new windows with gap vents (existing PAX fan is in the laundry room).
The alternative (which I'm actually leaning towards setting aside) is to tear down the brick wall, mechanically ventilate this as well as the adjacent wall, and also insulate from the inside. This seems in my world (and Anticimex) as both unnecessary and also removes a "part of the house's character"?
