Drywall against basement wall

[människa]

Hello everyone
I want to install a drywall against our basement wall.
The wall is made of isoblock, plastered on both sides, & with drainage boards on the outside.
So, no moisture should be able to get through, I think.
Do you think I should have an air gap anyway between the wall & the drywall? If possible, I want to avoid it to save space.
I'm considering if one can put a roofing felt between the wall & the drywall without air.
Opinions?

 

[AndersS]

I had metal-studded with 45 mm without insulation.

 

[människa]

Thank you, Anders.
I installed the inner panel against the wall in another room. There, I framed with 30mm wood which I had stapled underlagspapps-remsor behind.
But in this room, I really want to save space, and I preferably don't want to plaster.

 

[mojjen]

Air gap, alternatively cement boards, etc. We chose to use multipor instead. That way, we also got an insulated and warm wall. Extremely satisfied.

 

[människa]

No one knows if underlay paper + gypsum would work directly against the wall?

 

[AndersS]

Anyone know if underlay felt + gypsum would work directly against the wall?

How are you going to attach the boards to the wall since it needs to be screwed fairly tightly?

 

[människa]

How are you going to attach the boards to the wall when it needs to be screwed quite densely?

When I did the bathroom, I attached Jackon's wet room boards directly to the wall using their "slagdymlingar" which are pre-drilled & hammered in. It's almost like a large expansion nail with a big flat head. I thought they might work on plasterboard too if you're very careful.

 

[MathiasS]

....but the isoblocks are well sealed in this regard?

In that case, you would glue the plasterboard, right? There is mortar for that or otherwise, you use adhesive mortar....

Maybe a call to the manufacturer of the isoblocks to verify that it's not a foolish idea to skip the air gap?

 

[människa]

Yes, I mean that. Primer on both sides as well, & drainage boards on the outside.