Intermediate floor. How to make it quiet? In what?

[Atom]

If you want to build a house with two apartments, one downstairs and one upstairs (like a barn type), what should the intermediate floor be made of to maximally dampen footsteps and noise? And how much more expensive could it be?
It's about 160 sqm downstairs and 120 upstairs.

 

[justusandersson]

Preferably, it should be a concrete floor structure, but that's probably not realistic. An apartment-separating floor structure that dampens both airborne sound and impact noise primarily takes up more vertical space. Simply put, you need to build two floor structures that are separate from each other.

 

[Atom]

Ideally, it should be concrete slabs, but that's probably not realistic. An apartment-separating slab that is dampened for both airborne sound and impact sound, above all, takes up more height. Simply put, you need to build two slabs that are separated from each other.

Why is concrete slabs unrealistic? I don't know anything about this currently. Just wondering.

 

[justusandersson]

I might have misunderstood you when you wrote "typ ladugård"?

 

[Atom]

I may have misunderstood you when you wrote "kind of barn"?

My mistake.

1.5 story house. Completely straight. 21x11m.

 

[justusandersson]

Concrete floors assume some form of masonry walls on the ground floor. Does the building exist in reality?

 

[Atom]

Concrete slabs assume some form of masonry walls on the ground floor. Does the building exist in reality?

Nothing exists. Just an idea. However, I have started drawing on this.
Starting from Ytong 300/480mm.

 

[justusandersson]

With lightweight concrete walls, it is possible to cast a concrete vault. It was quite common in the 1950s. 11 m is a fairly substantial span that must be tackled in a systematic way.