How should I attach these studs?

[Drosen]

In my recreation room, I will cover the inside of the exterior walls with platon sheeting about 6 mm thick. On these, I will mount 45x45 battens. On the battens, I will then screw 600x2400 pre-painted Huntonit panel boards.

The walls consist of concrete hollow blocks with about 10 mm plaster on the outside.

How should I attach the battens in the simplest and best way?
80 mm long nail plugs would be too short as they need to go through 51 mm of material?

Edit: I see that ESSVE has 100 mm and 140 mm nail plugs...

Could it be possible to just nail everything with some stainless coarse nails?

 

[raveper]

I had been considering metal studs in the basement..

 

[MTech]

Agree with raveper!

 

[hantverkare1]

I also agree with raveper!

 

[Drosen]

With metal studs, I can't achieve the air gap at the top and bottom that I want to ventilate away any moisture. Unless I add spacers. It will have to be 100-120 mm spike plugs.

 

[raveper]

Would still have used steel studs in the basement.
It can't be difficult to set them on spacers.