Inner panel directly on concrete blocks, how would you have done it?

[Otto-Von-Stern]

I was thinking of attaching inner paneling directly to a couple of lecablocks, but I'm a bit unsure about the technical aspects of preventing moisture from affecting the paneling. I thought of nailing a small strip to the lecablocks with cut nails and then attaching the paneling to these. Is this an okay solution? Or should I treat the blocks with some form of moisture barrier paint or cover them with tar paper?

 

[Stuff]

I have installed paneling on a wall of concrete block as a "feature wall" but on a completely dry interior wall. Mounted vertical 28x70 mm battens on cc60 with the help of facade plugs. Between the battens and the concrete block, I placed sill insulation before fastening the battens. I used plastic sill insulation as I thought the paper variant smelled too much of tar.
After that, horizontal paneling was installed on the battens with a ventilated base towards the floor and a substantial gap between the ceiling and ceiling molding. No insulation was used behind the paneling, so there was about 28mm (battens+sill insulation) of air gap behind the paneling.

What kind of wall is it? Interior or exterior wall? Above or below ground? Is it damp today?

 

[Otto-Von-Stern]

Thank you for your response Stuff, they are exterior walls and the blocks face the outside without insulation.

 

[Otto-Von-Stern]

Any more suggestions on how I can moisture-proof the lecablocks, or should I just nail the strip directly onto the lecan?

 

[SBH]

roofing felt on the nailing strip?