Meticulous substrate preparation is the basis for a sound floor structure – in the construction of new floors but also in the renovation and repair of existing floors. Cracks need to be closed, holes filled and the floor carefully primed and levelled to provide a smooth surface. Possible substrates include not only old and new screeds but also wearing surfaces like wood and tile floors.
Repair, filling & patching of cracks
If cracks have formed in the screed, suitable screed repair measures must be taken. The cracks need to be expertly prepared and then filled with resin. Cracks are typically caused by shrinkage in new screeds or by too heavy loads on old screeds.
Very uneven areas or dents and holes in the substrate must be levelled with non-slump levelling compounds. These fast-setting special products enable rapid progress on site. But non-slump compounds can also be used for embedding screed rails and for producing slopes in the floor.
Primers fulfill a variety of functions in the floor structure. As a bonding bridge, they provide a secure bond between levelling compounds or adhesives and the substrate, for instance a concrete or screed floor. Reaction resin primers serve as a separation layer: they protect against chemical reactions or residual moisture rising from the substrate. Moreover, primers bind the remaining dust and can even have a filling effect.