Apartment-internal inserted ceilings are usually filled with a 100 mm layer of glass wool that to some extent insulates sounds transmitted through the air as well as the sound of footsteps, since apartment-internal inserted ceilings are not subject to such strictly regulated acoustic insulation and fire safety requirements. Depending on the client’s request the inserted ceiling may be filled with insulating material to the entire height of the beam to achieve better acoustic insulation. The inserted ceilings are also filled with insulating material to the entire height of the beam on the outer wall perimeter to provide sufficient thermal insulation.
The accompanying image shows a principal solution for an apartment-internal inserted ceiling.

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