It is hard to imagine contemporary bathrooms, showers, laundry rooms, or kitchens without ceramic tiles of stunning design and excellent surface technology. Ceramic tiles are frequently used in rooms or areas subject to high moisture, chemicals, and abrasion. Tiled floors and walls are expected to offer lasting beauty and long service life. Therefore, planning details like waterproofing-sealing, edge bridging, and the right choice of grout and adhesive are essential factors.

Step by step


Checking and preparing substrate is crucial to avoid claims and guarantee a long-lasting result. Basically, the surface must fulfill the following conditions: it must be sufficiently load-bearing, dry, even, and free of dust and grease.

Surface must be perfectly even with all correct angles, while kitchen or bathroom is relativelly small room usually very well illuminated. All incorrections will become visible. Also perfectly preperared surface will require just correct and predefined amount of waterpprofing layer. Always two layers is required in spite which type of liquid insulation will be used from Ceresit portfolio. This is to avoid any space missing to get full continuity of water proofing. Pre-cut collars from CL 152 or CL 69 membrane if required for water pipes or drainages, depending on the size needed. All connections and pipe passages must be fited tigthly. For corners either ready to use elements could be used ( outside and inner corners CL 82 and CL 83 ) or pre-cut from CL 152 tape. 


It would be wrong to assume that a completely tile-covered wall or floor area is waterproof. Joints allow moisture and water penetration into the substrate, causing long-term damage. Some surfaces are directly exposed to contact with water; these include the walls and floors of showers and their surroundings, as well as the area of bathtubs and washbasins. These areas must be protected by applying special sealing layers under the tiles. First, seal the surface properly and then fix the tiles – this is the fundamental principle that applies to surfaces exposed to moisture. Ceresit under-tile insulation system is effective, easy, and quick in the application.

Always two layers is required in spite which type of liquid insulation will be used acrylic or mineral base. This is to avoid any space missing to get full continuity of water proofing. CL 152 tapes in corners, joints and between different material types  are reccomended to be embendded into freshly aplied first layer. CR 166 can be applied with different tools such as paint brash, roller or trowel, important is to achieve required final thickness of layers. In case of working in warm conditions to extend overlaping time it is reccomend to mix material in working pot from time to time. Dried waterproofing layer perfectly cooperates with either mineral or epoxy adhesives from Ceresit portfolio.


Choosing the appropriate adhesive depends on the nature of the substrate (underfloor heating) and - to a large part - on the tiles used: whether ceramic, porcelain, natural stone, or glass mosaic. Ceresit offers the appropriate tile adhesive and a wide range of grout colours to give a modern bathroom or kitchen the final touch.


After mixing, the grout can be applied directly from the mixing container with a trowel. The grout is spread with a hard rubber float if used on walls and floors. Use the float to press the grout into the joints until filled void-free and flush with the tile surface. Afterward, excess grout is removed from the tile surface using the edge of the float held at a 90° angle. Stroke diagonally to remove as much grout as possible from the surface without pulling grout out the filled joints. In order to obtain a uniform, aesthetic appearance and allow easy cleaning, the joints should be left to “mature” (or firm up) after grouting.