Dynamic Stiffness Measurements

The dynamic stiffness is an important parameter when optimising floating floors. This is true both with respect to air- and structure-borne noise, as well as impact noise.

In principle, the dynamic stiffness should be as low as possible in order to obtain a low natural frequency of the floating floor. On the other hand, the load bearing capacity and the possible unfavourable experience of walking on a floor that is too soft may set a lower limit for the stiffness.

Rockwool Marine Slab 140 is the most common product used for floating floors. This product is produced according to specific levels of dynamic stiffness according to thickness and the static stiffness also called compression strength. The below graph shows the relation to dynamic stiffness, thickness and compression.