Sound insulation is also important here.

This type of screed, as related, directly comes into contact with the ceiling, and it should be no thinner than 2 cm. It is primed in order to prevent stratification of the base. All floor layers with a floating structure are separate from the base and ceilings, the thickness of which is 3.5-4 cm. It is strengthened with a metal mesh to prevent cracking. Sound insulation is also important here. Another important one is a screed on the separation layer. It is arranged when the surface of the base is too weak. At first, such a floor is primed, then a waterproofing film is applied, and only then the screed is performed (about 4cm).