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

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

Why don’t you install a beam layer on the concrete floor, with insulation in between, and then a plank floor on top?

I had considered that as well, but didn’t find a reasonable answer regarding the settlement of hemp-light clay loose fill.

Bremer_Haus schrieb:

I also considered that but couldn’t find a satisfactory answer regarding the settlement of hemp lightweight clay fill.

At that time, I used cork granulate with floorboards directly on top. They are still intact after 30 years, and it was one of the better ideas back then—I would definitely do it again.

I take your word for it and am really impressed as well. My only concerns are a) that there might still be residual moisture in the foundation slab (wintering it out isn’t possible due to the schedule) and b) the manufacturer states that the floor will settle by about five centimeters (2 inches) over time. I’m just worried that everything might end up uneven or crooked later on.

In this wooden version, you would most easily be able to make adjustments later; if necessary, you could live with OSB boards for a while. A precast concrete floor would likely develop significant cracks.