What are the types of grout


Cement joints
The purely cement-based joint is offered as a tile joint narrow, narrow and wide, wide, polygonal joint or slurry joint. It consists only of finely prepared cement, color pigments and fillers without plastic. Pure cement joints are used for unproblematic coverings or an inexpensive tile joint.

Plastic-modified cement joints
The plastic-modified cement joint, also known as the flexible joint, is available in narrow, wide and extra-wide. There are quality differences in the fineness of the components. This tile joint is made up of finely or very finely prepared cement, color pigments, fillers and a corresponding proportion of plastic. This plastic component causes a certain flexibility as well as a higher flank adhesion of the tiles to one another. This tile joint is used on the one hand for floor tiles or wall tiles with increased requirements (floor heating, terraces, young tile substrates, problematic substrates with regard to stability, tile material with extremely low water absorption such as porcelain stoneware or artificial stone). On the other hand, there are now flexible joints with a pearl effect, which are processed so finely that their components literally sinter together, thus preventing the ingress of water and thus dirt. This "property" only works until the customer does not make any mistakes in maintenance and cleaning.
Tip: Flexible joints must be washed very cleanly to prevent plastic from remaining on the tile surface. The term "flexible joint" leads to the assumption that it is a flexible joint compound; however, this is not the case.

Quick joints

During the construction process, it may be necessary for a floor covering to be accessible again quickly, e.g. in shopping malls or shops. The tile joint can be designed as a rapid joint for this purpose. At normal room temperatures, this sets within a few hours - this is referred to as rapid stiffening behavior - and quickly achieves the necessary mechanical load-bearing capacity. After complete hydration, the rapid joint is also absolutely waterproof and frost-proof. Some quick-release joints also have the advantage that large floor areas can be inserted without having to repeatedly wash parts off after a short period of time. This is made possible by an optimized washing-up time window, which starts earlier than with "normal" joint mortars and is open longer at the same time.

High strength cement joints
This very finely prepared joint material - using microcement technology - sinters together so closely in the setting process that it almost reaches the density of an epoxy resin joint, becomes highly abrasion-resistant and even resistant to weak acids.

Epoxy resin joints (based on reaction resin)
If diffusion-tight and chemical-resistant joints are required, grout made from solvent-free, two-component epoxy resins to which fillers and color pigments are added. With these epoxy resin joints, mosaics can be glued and grouted at the same time. Otherwise, they are mainly used on problematic substrates or in wet areas exposed to water (swimming pool tiles, large kitchen floors, showers). The processing of epoxy resin joints is more complex and also a lot more expensive than with cement-based joint mortars. On the other hand, the epoxy resin joint has particularly good flank adhesion, is very easy to clean, chemical-resistant and extremely hard-wearing. However, the epoxy resin joint is relatively rigid and does not allow any water vapor to pass through.

Since tiles are practically impermeable to vapor, only the joint can fulfill the task of transporting water, which is particularly important for outdoor coverings such as terraces. If, for example, there was excess water in the tile adhesive or if water penetrated into the tile adhesive, the joint must be able to release this moisture back into the air in the form of steam.Otherwise, when exposed to heat, steam pressure can develop and, when there is frost, an explosive effect (increase in volume due to the formation of ice) can result damage to the tile covering. If diffusion is desired, epoxy resin joints are therefore unsuitable.

Dispersion joints
Problems with soiled joints and changes in the color of the joints - especially in the walking area - are steadily increasing, although the quality of the cement-based tile joint is much better today than it was a few years ago. Despite the now excellent quality of cement joints, these tile joints also change over time (light joints become darker, dark joints lighten). The desire for permanently color-stable joints - especially for white joints on the floor as well - cannot be met with cement-based joint material. With a one-component dispersion-based polymer joint, on the other hand, it is possible to keep white joints clean with just warm water. For this purpose, these joint mortars can be adjusted so flexibly with the aid of an elasticizer additive that significantly fewer expansion joints have to be installed. They are also suitable for high hygienic requirements and are also particularly dirt-repellent.

In general, the following applies to all types of joints: In order to protect the joints from dirt, stains, moisture and mold, they can be additionally protected by subsequent impregnation. In addition, manufacturers of professional cleaning and care products also have special joint cleaners for the gentle cleaning of heavily soiled joints.

Expertise on the subject

Areas of application

Kitchens and bathrooms

Tile mirrors are often installed in kitchens, which are designed as a special design element. Stand for...

Ceramic coverings

Mosaic tiles and panels

Tiles or slabs with a surface area smaller than 90 square centimeters are called mosaic tiles. They have a very ...

Ceramic coverings

Cleaning and care of ceramic tiles

A key consideration when choosing tiles is cleaning. Whether this turns out to be easy or difficult depends ...

Areas of application

Swimming pools

Tiles that are laid in the barefoot area of ​​a swimming pool have special surfaces. You need to...

Contact the Baunetz Wissen editorial team: [email protected]
Baunetz Wissen tiles and slabs sponsored by: