Double basement walls

[eriobe]

I am about to renovate the laundry room located in the basement (below ground). The previous owner had put up particle boards on the walls which now had black mold. I have now torn them down.

The old construction looks like this:

Isodrän (100 mm), concrete wall, air gap (about 30 mm), brick wall (50 mm), battens (45 mm), insulation (45 mm), plastic, and drywall.

This is not a good solution for walls in a basement. But what should I have instead?

Here are some alternatives I have come up with:
1. Tear everything down to the concrete wall and paint it (with silicate paint)
2. As above, but with tiles instead of paint
3. Keep the double walls and plaster and paint the brick wall. The problem is that the wall is built with bricks on edge (long side) and is therefore unstable. Then I need to reinforce it in some way.
4. Put up foam panels (frigolit) on the brick wall and plaster them, thinking that this would be stronger than plastering directly on the bricks.

I really don't know what to do. Feeling like I'm in the situation of "Hey kid, just do this now."

 

[V.Ekeberg]

I am about to renovate the laundry room located in the basement (below ground level). The previous owner had installed particle boards on the walls, which now had black mold. I have now removed these.

The old construction looks like this:

Isodrän (100 mm), concrete wall, air gap (about 30 mm), brick wall (50 mm), studs (45 mm), insulation (45 mm), plastic and drywall.

This is not a good solution for walls in a basement. But what should I use instead?

Here are some alternatives I have come up with
1. Tear everything down to the concrete wall and paint it (with silicate paint)
2. As above, but with tiles instead of paint
3. Keep the double walls and plaster and paint the brick wall. The problem is that the wall is built with the bricks on edge (long side), making it unstable. Then I need to reinforce it somehow.
4. Install foam (polystyrene) on the brick wall and plaster them, thinking this would be stronger than plastering directly on the bricks.

I really don't know what to do. I feel a bit like I'm in the "You, kid, do this now" situation.

Hello!

How did you eventually proceed? I've found a similar construction in our basement and don't understand the purpose of the air gap?

 

[eriobe]

Hello!

What did you end up doing? I have found a similar construction in our basement and don't understand the purpose of the air gap?

I plastered and painted with silicate paint