Build thin wall

[hövd1ngen]

Time for bathroom renovation and I've encountered a small problem. Above the door, there is some kind of masonite/cardboard wall that I want to remove and build a proper wall instead. The problem is that the wall where the door is located is only 70mm light concrete. I would like to have gypsum + 15mm plywood towards the bathroom, which doesn’t leave much room for studs and paneling towards the opposite side of the bathroom.
One idea is to place the plywood between the studs instead. Does anyone have any suggestions?

 

[Thomas_Blekinge]

You don't need to have studs at all. Put together as many plywood and gypsum boards until you reach the right thickness.

 

[hövd1ngen]

Okay, but how should I attach the discs?

 

[RiKr]

gypsum 13
plywood 15
sparse panel cc300 28
gypsum 13
total 69mm

Should work on such a small area

 

[hövd1ngen]

Thank you, but isn't it true that you can't attach wood directly to lightweight concrete because of moisture?
Is it enough to have some plastic in between?

 

[hapazard]

Thanks, but isn't it true that you shouldn't attach wood directly to lightweight concrete because of moisture?
Is it enough with some plastic in between?

If you have moisture problems above the door inside the house, you have bigger concerns....

 

[hövd1ngen]

No, I don't think so. But it has been explained to me that you shouldn't build like that. But maybe it only applies to wood directly against the slab/floor.

 

[Claes Sörmland]

gypsum 13
plywood 15
sparse panel cc300 28
gypsum 13
total 69mm

Should work on such a small area

Replace the sparse panel with 28 mm tongue and groove, and it will be even easier.