Now the building permit has finally gone through, and it's time to tackle the K-drawings. My architect has suggested a wooden intermediate floor between the basement and the ground floor of the house, but I'm a bit hesitant about this. I will have a basement only under part of the house and have a carpentry workshop there. Due to the noise, it feels better with a concrete or lightweight concrete floor. The disadvantage of concrete is, of course, the price.

But how much is the additional cost for a concrete floor (does not need to be cast on-site) or one in lightweight concrete compared to a wooden floor?
 
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Pyroholic
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Lightweight concrete costs approximately 400:-/m2 delivered, not installed. (Based on 100m2 flooring, excluding VAT)
 
Are you sure it will be quieter with concrete? I'm not...
 
Isn't it? I've always taken it for granted, but maybe I'm wrong... With the greater mass of the concrete slab, it should be more difficult for vibrations to get through, shouldn't it?
 
No. Soundproofing is very complex.
Of course, there is a thickness to the ceiling or wall where the mass is so large that sound waves cannot set it in motion, but then we're talking church walls.
A wooden ceiling can undoubtedly be quieter.
We previously lived in an apartment building in Årsta, a house built of brick with concrete ceilings and concrete interior walls. You'd be hard-pressed to find something more acoustically transparent! Especially between floors. Footsteps weren't heard as clearly, but voices, TV, radio (toilet visits..!) were heard crystal clear.

Usually, you say you should have insulation in different densities to capture noise in different frequency ranges.

In the house we live in now, we have 195mm ecowool in the intermediate ceiling.
Here it's the opposite of before - footsteps can be heard faintly (my wife is a heel walker :) ) but otherwise it's very acoustically well-insulated.

Mineral wool probably works just as well if you don't skimp and put in a measly 95mm slab like many house manufacturers seem to think suffices - if they put in anything at all.
I believe that fully filling the ceiling does wonders so you don't get a sound box in there.
 
I vote for Lättbetongen anyway but you already knew that K12! ;D

I was inside a lättbetong house this spring and it was quiet as hell, to put it bluntly. So I fell like a fura for the property.
 
Yep, I know... ::)

Mm, I think that the lightweight concrete is quieter than the regular one, absolutely. It is significantly more porous and lighter, which should be an advantage acoustically.
My friend is currently building an HH Celeron house. The frame will be up in a few weeks, so there will be a report then. :)
 
F
What can one expect to pay for a traditional wooden floor structure?
 
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