I am a complete beginner at building things for and in houses, but after water damage in the basement, I've been forced to tackle things myself.

In one of the rooms in the basement, I need to frame a new wall with steel studs, and from what I understand, you need to attach/screw down the top track and bottom track, but I'm having some trouble with the bottom track.

The previous wall was probably built before the "inner floor slab" was cast, which has created a gap between the slab and the outer wall (5.5 cm on one side and 7.5 cm on the other). The gap varies in depth, but it's incredibly porous concrete, almost like gravel.

How would you proceed here? Would you fill in the gap with concrete and place the track/steel track on it, or how do you secure the track and make it level?
I'm afraid that if you fill it in, the new slab will be too thin to drill/screw into and will just crack.

Grateful for any answers 😊
 
  • Corner of a basement with unfinished concrete walls and floor, showing a gap between the floor slab and wall, filled with loose, porous concrete.
  • Concrete basement floor with a gap between the floor and brick wall, possibly from previous wall construction, showing a rough and porous cement finish.
  • Concrete floor with a gap between the floor slab and a brick wall in a basement, showing porous concrete and loose gravel-like material in the gap.
You know that you shouldn't build on basement walls from the inside? To answer the question. How wide studs are you thinking of? You can attach them to the wall if you want to avoid casting the gap again.
 
Build with Leca or lightweight concrete, and you'll get a wall that provides some insulation and is moisture-proof...
 
K
Larsa Larsa said:
Build up with Leca or lightweight concrete, then you will have a wall that insulates a bit and is moisture-proof….
Moisture-proof leca/lightweight concrete?
What do you mean?
 
That the wall does not become so sensitive to moisture. Wool insulation with boards in a basement that is not very dry I would hesitate about...
 
Matti_75 Matti_75 said:
You know that you shouldn't build on basement walls on the inside, right? To answer the question.
How wide studs are you thinking? You can attach them to the wall if you want to avoid casting the gap again
Why not? The house is newly drained and insulated from the outside by a professional company. I'm thinking of framing a ventilated wall with metal studs and a type of trossbotten in fiber cement. No insulation against the wall since it's insulated from the outside.

The room will be used as storage (and is therefore a bit of a trial and error project on my part). The reason for framing two walls is to make it look a bit nicer and hide the electrical wiring.

I was thinking 70 studs, but I'm open to suggestions 😊
 
But can't you just polish the walls instead?
 
Larsa Larsa said:
Can't you just plaster the walls instead?
Yes, that has also been an option, but I thought it would be easier to put things up on the walls if it's not concrete or plaster (and maybe I could learn something along the way 😅)
But I've heard that it's difficult/tricky as hell to get a good plaster finish?
 
G GGStrand said:
I am a complete beginner at building things for and in houses, but after a water damage in the basement, I was forced to tackle things myself.

In one of the rooms in the basement, I'm going to build a new wall with steel studs, and from what I understand, you should attach/screw the ceiling track and floor track, but I have some problems with the floor track.

The previous wall was probably built before the "inner floor slab" was cast, which has created a groove between the slab and the exterior wall (5.5 cm on one side and 7.5 cm on the other). The groove varies in depth, but it is incredibly porous concrete, almost like gravel.

How would you proceed here? Pouring concrete to fill the groove and lay the track/steel stud on it, or how do you attach the track and level it?
I'm afraid that if we pour concrete to fill it, the new slab will be too thin to drill/screw into and will just crack?

Grateful for responses 😊
I have such trenches myself. The easiest way is to fill with expanding concrete, it flows very well and fills all the gaps. But you must clean the trench thoroughly first. You won't get a mechanically good grip on the base, but a smooth floor to work with afterward.
Personal tip: Avoid cladding the walls. Hire someone to plaster and then paint with the right color and it will be fantastic!
 
If you're going to use it as storage, I can only see advantages to plastering the walls.
Simpler, cheaper, easier to, for example, screw up shelves
 
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