Attach thin light concrete to uneven solid brick wall with gypsum mortar?

[Fredric Berling]

Then I would be more worried about the wooden studs, though...
If it's above ground, just cover it and forget about the hole behind.
If it's below ground, mistake no.1 is the wooden studs.

ok. Yes, it is above ground but the wooden studs never directly touch the brick anywhere. That's "risk-free," right?

 

[Alexn72]

Straight towards the brick?

The insulation is mostly about preventing a resonance chamber.
As mentioned, your wooden studs are the first to be affected...

Probably all the alternatives suggested in the thread will work for you.

 

[Fredric Berling]

The insulation is mostly about not getting a resonance chamber.
As mentioned, your wooden studs are the first things to be affected...

Probably all the alternatives mentioned in the thread will work for you.

Ok. I understand. But what is the risk with the wooden studs? They don't touch any brick.

 

[Alexn72]

Ok. I understand. But what is the risk with the wooden studs? They don't touch any brick.

The risk is that the bricks might carry moisture, and the space where the studs are could have higher humidity, causing the wood to both mold and rot. But if the brick wall is otherwise dry, there shouldn't be any problems.