Soundproofing Floor

[lillle22]

Hi, I have read some on the forum about soundproofing the floor.

I have the following consideration that I would like your opinions on.

1. 14mm Wood floor
2. 2mm Decibex
3. 13mm Floor gypsum
4. 13mm Floor gypsum
5. 17mm Impact sound board (paroc)
6. 38mm Compact floor (Byggelit)
7. ?mm Air gap
8. ?mm Stone wool (Sawdust today)

This construction builds 97mm above the joists which is quite large in some rooms. If you had to reduce the 97mm, what would you change? Or would you do it in a completely different way?

 

[Perrka]

Feels like very different things for laying a wooden floor. I would probably lay a slightly thicker wooden floor that supports itself. And fill the joists with insulation that has good soundproofing. Stone/glass-wool has quite poor soundproofing properties. On the other hand, various cellulose-based insulations are significantly better (Warmcel, Ekofiber, etc.). It is possible to blow in from the side if you wait with the last planks until after the insulation. Perhaps the impact sound board can dampen the sound that propagates through the beams...

 

[lillle22]

Feels like a lot of different things to lay a wooden floor.
I would probably lay a slightly thicker wooden floor that supports itself.
And fill the joists with insulation that has good soundproofing. Stone/glass wool has quite poor sound insulating properties. However, various cellulose-based insulations have significantly better ones (Warmcel, Ekofiber etc). It is possible to blow in from the side if you wait with the last planks until after the insulation.
Maybe the impact sound board can dampen the sound that is transmitted through the beams...

What wasn't clear was that it is a two-family house where you can hear quite clearly when people walk and what they say. Looking at how it's done in new apartment buildings, they seem to use a lot more material as far as I can tell. But you don't have unlimited space, so all tips are welcome.