An effective floating floor has as a heavy top layer and soft bottom layer. PAROC stone wool under concrete slabs that are at least 50 mm thick is the optimal solution for floating floors. Ensure that the concrete slab on top of the insulation is totally separated from the surrounding walls. Use a piece of insulation during the casting to form the needed gap between the wall and floor slab.
Table below: Approximate data for airborne and impact sound insulation of different concrete floors, with and without a floating floor:
Find the solution you need below for different types of floating floors. First, choose first the level of sound insulation you need, then check then the construction layers required to achieve the level. The level is based on local building regulations. From the two last columns you can also find airborne sound insulation values for these floor types.
Note: The values above are valid for structures in a building, including flanking transmission and other factors. An isolated structure measured in a laboratory may give better values.