In accordance with DIN 18157 the installation of tiles to dense concrete is only recommended after 6 months at the earliest. Causes for damage are the high shrinkage stresses that ‘green’ concrete substrates exhibit. In our experience, when installing on ‘green’ substrates, only highly elastic tile adhesives such as UNIFIX-S3 or UNIFIX-S3-fast are recommended. Only a product which exhibits this type of highly deformable technological profile – reliably dissipating high shear forces – can be used. Before installing the tiles, it is mandatory to prepare the substrate using shot blasting, high pressure washing or similar techniques.
NOTE: Ensure that there is no rising damp coming from the substrate. This type of installation does not comply with the generally recognised rules of technology and must be contractually agreed separately.
