To deal with this phenomenon, in buildings of this type at the construction stage, floating floor screeds are necessarily cast, under which a layer of material with a low elastic modulus (fiberboard, mats made of porous rubber, etc. p.) about 20 mm thick. SNiP 23-03-2003 “Protection from noise” orders to separate the layer of concrete from walls and partitions with the same material, but the builders began to implement this recommendation in practice relatively recently.