Cracks in the screed must always be repaired. For this purpose, special reaction resins can be used that feature a low viscosity (very liquid consistency) and rapid hardening.
Undercoats and primers form the bonding bridge between the substrate and the levelling compound or the adhesive applied on top. Their use is prescribed by DIN 18365 "Flooring Works". It is always necessary to follow the manufacturer's instructions for use.
Different types of levelling compounds can be used to ensure an even surface of uniform absorbency prior to bonding the floor covering.
Screeds form the load distribution layer. They are normally installed on top of concrete floors. When produced as in-situ screeds, they are made from aggregates (gravel, sand etc.) and suitable binders. A fine aggregate is used for screed production in order to ensure layers with a smoother and more even surface.