Waterproofing and application of ceramic tiles over existing ceramics

Surface preparation

Care must be taken to ensure that the application area is durable, dry, clean, dust-free and suitable for the next steps. The surface must be free of all oil, rust, thick lubricating oil and paraffin residues that will weaken the adhesion, the surface must be free of debris and the surface must be saturated with moisture. Next, the strength of the existing ceramics should be checked. Cracked or loose slabs should be removed and surface cracks and gaps must repaired with suitable TAMCRETE® repair materials. In order to increase adhesion to existing ceramic surfaces, KONTAKT ASTAR material should be used.

Application of water insulation

In wet areas such as bathrooms, a two-component flexible IZOMAX® C40 or fully flexible IZOMAX® C75 FLEX waterproofing product should be applied. Weak parts of floor, wall and corner joint lines should be reinforced with IZOMAX® PAH BANDs. Exact middle of the chamfer bands should be placed on the coinciding lines of the different surfaces which were primed with water insulation product that was applied by a brush or a roller.  Each layer is applied in the opposite direction of one another. Depending on the temperature of the environment, the next layer should be applied after waiting 5-6 hours. After application, it should be allowed to dry completely for at least 7 days and leak tests should be carried out for 24 hours.

Application of ceramic tiles and joint filling

CERAMAX® class C2 according to EN12004-1 standard products with increased additional features should be used for large-sized ceramic tile application over waterproof insulations. In wet areas such as bathrooms for long-lasting joint filler FUGAMAX® FLEX should be used which is silicone-based, flexible, and antibacterial.