ᐅ Impact sound insulation in the concrete slab (floor slab)

Created on: 16 Jul 2020 21:45
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Bremer_Haus
Hello everyone,

The idea is to create the thermal slab without an additional floor structure and leave it as exposed concrete. How does this affect impact sound insulation, or would it be possible to include impact sound insulation within the concrete? The reason is that I am not a fan of screed, neither dry nor wet installed. The wet option is out of the question anyway since the building is timber frame construction.

Thanks and best regards
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Bremer_Haus
16 Jul 2020 22:03
That's right, and since the floorboards are lying on the battens anyway, any possible rework probably won't be a big issue. Now I just need to find out how well the hemp-clay insulation works with the residual moisture.
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pagoni2020
16 Jul 2020 22:07
Bremer_Haus schrieb:

That's right, and since the floorboards are lying on the battens anyway, any potential rework probably won't be a big issue. Now I just need to find out how well the hemp-clay infill handles the residual moisture.

You probably won't get a definitive answer because it’s hard to predict precisely. Could you temporarily install OSB directly on top without the infill and then add the insulation after everything has dried out?
Or, an idea from my excellent site manager back then was to use fine, dry sand as insulation. It would absorb moisture and could later simply be removed.
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Bremer_Haus
16 Jul 2020 22:19
Since the apartment is going to be rented out immediately after completion, this is unfortunately not an option. However, I will clarify this.
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pagoni2020
16 Jul 2020 22:21
Oh dear... then you will probably need extensive drying and have to accept the risk when finishing directly. I think insulation will also absorb moisture, so you have to watch out for mold and rot... fingers crossed
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pagoni2020
10 Nov 2020 14:12
Bremer_Haus schrieb:
Since the apartment is going to be rented out immediately after completion, unfortunately that is not an option. However, I will clarify this.
So... how did this matter develop further for you?