Hello,

I'm going to renovate the family room and hallway in the basement. Thinking about the part that is underground.
It was relatively recently drained (mid-90s) and the moisture levels are barely measurable against the wall. (However, there is high moisture in the hallway floor because a plastic mat was laid on wooden beams directly on the base slab there.)

I am considering, though, the interior walls... I'm going to reset them with steel studs and am considering the steel studs that Byggmax sells (http://www.byggmax.com/sv-se/byggvaror/virke/stalreglar/stalregel-p20841).

I was thinking of screwing up gypsum walls on this, but I am considering insulation. Should one insulate, and if so, with what type of insulation and how? I assume the insulation should not lie directly against the concrete wall, maybe you should have some "mid studs" to hold the insulation so it doesn't rest against the concrete wall?
 
You should have, just as you write, an air gap between the insulation and the existing basement wall. I have seen some different solutions for keeping the insulation in place. You can stretch strings/wire in a cross pattern between the studs or attach some form of netting on the back of the studs.

And the studs you linked to work excellently for this purpose.

Then, there are divided opinions regarding insulation below ground. Some insulate from the outside, others from the inside. I will leave this discussion aside. There's some useful information to read on the forum.
 
I don't know how knowledgeable my source is in this case (a guy who worked at Byggmax) but I got information from him that you could indeed insulate against the outer wall as long as the insulation isn't organic..?
 
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