Hi. I'm in the process of renovating a room. The existing built-in closet from '68 will be torn out. When I've almost completely removed it, I see there are no studs. The wall panel in the adjoining room is nailed into the back of the closet and partially comes loose when I pull the closet away. So there's a bit of a gap at waist height now next to the other room.
My solution, I'm thinking, is to build some kind of frame/light stud with battens or timber with a thickness of 20-25 mm and a width of 48-63 mm, which will be attached to the ceiling joists and the wall, or also to the concrete slab. The depth with the drywall that will be installed will be 610 mm. The new closet has a depth of 585 mm. So I have 25 mm to work with in depth.
My other problem, then, is that the wall to the right of this picture is attached in the same way to the closets in the adjacent room. The problem is that I need to add drywall now, and that wall is about 3.5 m long. So it's a 3.5 m closet wall in the next room. Should I just nail into the building panels that have been there for years, angled up toward the ceiling from this side, and hope it holds, and properly frame it (as there's more space for that in that room) in the adjacent room the next time I renovate there? Renovating that room now at the same time is not an option.
How would you do it? Need some feedback!? See picture