Hello! We have a small extension and have now demolished the wall between the extension and the original house. In the extension (furthest in the picture), there are 22 mm chipboards.

QUESTION 1:
The level difference between these rooms is 36 mm. How do I solve this in the best way?

A) Do I lay 22 mm floor chipboard + 12 mm floor chipboard + two layers of 1mm felt paper?
B) Or do I buy 34 mm studs from Bauhaus? And then two layers of 1mm felt paper? It's cheaper and faster. However, I find that these studs are not always perfectly straight? Does it resolve when you screw them into the floor?

QUESTION 2:
Unfortunately, the extension also slopes away from the original house. 8 mm over 130 cm. How do I best address this? I assume an additional 8 layers of felt paper would be an overly soft base?

A kitchen will be along the outer wall (building 65 cm of these 130 cm).

I will lay spruce flooring 28x110 mm in the same direction as the photo (from the outer wall towards the camera).
 
  • Interior renovation with level difference, showing a new extension, chipboard flooring, tools, and construction materials; querying floor leveling solutions.
Staffans2000
If it is the extension that has the lowest floor, you can place spacer strips of varying thickness. That way, you'll eliminate both the height difference and the slope.
 
Staffans2000 Staffan2000 said:
If the extension has the lowest floor, you can place spacer strips of varying thickness. This will eliminate both the height difference and the slope.
Yes, it is the extension that has the lowest floor! Do you mean studs of different thicknesses? Or is "distanslister" something else? :-)
 
Staffans2000
You already have a finished floor, but it's too low, and your intended pine floor can withstand being laid on joists without a solid subfloor!? Yes. I mean joists cut as spacer ribs of various thicknesses to both compensate for the height difference and the sloping floor at the same time. That way you kill two birds with one stone!
 
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