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Remove tile joints and replaceIf the tiles are not all around handsome, the whole bathroom loses. Often it is the joints that no longer look beautiful. If the joints look unsightly only because the intensity with which they have to be cleaned has been underestimated, a cleansing is worthwhile.
A thorough cleaning is then done with a household cleaner, a hard brush and a lot of human labor.
Vinegar cleaner or decalcifier is taboo for this attempt, as it attacks the grout. Good, on the other hand, soda has proven itself, from the powder form you can mix with water a porridge, which you stroke on the joints and first let act for some time. Sometimes the miracle works. If a black surface is to be seen, it is often already mold. This often shows in silicone joints, the mold spores have there ideal growth conditions. In this case, a special mold remover may help, if the mold is strong or even loose parts can be removed, at least a partial renewal of the joints is to be considered.
Renew tile joints partially
Remove any loose pieces from the joints and grout them with the same grout. If the joint compound is no longer available, the color difference would result when using another joint compound, but unfortunately the joints have to be completely renewed.
Renew tile joints completely
First, the old tile joints must be removed, that can
done with a little tool called Fugenkratzer. First, check the application. For very hard joints, handling the joint scraper can quickly damage the tile edges. The same applies to the second possible method, the scraping of the joints with chisels and hammer. For such cases, the use of an electric grooving is recommended. So you can remove the joints quickly, without dust nuisance and without damaging the tile edges.
Joint milling machines can be rented in the tool rental shop. It is recommended to wear a dust mask when milling. Remains of the old grout can be carefully removed with a fine wire brush. It should also give a gel that you apply about 2mm thick and covered with foil. After 24 hours, the gel should be brushed off with the excess grout material; also
a removal with a pressure washer should work. Diluted hydrochloric acid can also remove the residues (pour one part of hydrochloric acid into two parts of water, never the other way around because of heat and risk of splashing!) - but beware, it is corrosive: Wear protective gloves and protective goggles.
Silicone joints can be cut open on both sides with a utility knife and pulled out. You should be careful because often a coating was placed behind the tiles, so that no moisture penetrates behind the tiles or into the masonry. This must not be damaged. Remains are removed with silicone remover.
Renew tile joints
Now the new grout is mixed according to the package instructions and the tile grouted new. When re-joining, you can consider special requests:
- Elastic joints are obtained with a special pool joint or when you use a special synthetic syrup instead of water or when you use the ready-made flexible joint mortar.
- Also possible as a grout is grout, which lets the water roll off, especially for the wet area.
If you are doing this job for the first time, we recommend a helper who can compensate in an emergency. After drying, be
the tiles are rubbed clean and polished. If it is a Silikonverfugung, there is also special tool for smoothing the joint after the order from the cartridge. In mold-prone areas, you can use a high-quality fungicidal silicone compound to re-joint.
Prevention of new evidence
After using the tiled area, there should be no water left on the tiles and joints, so the wall should be pulled off with a rubber lip. Help against mold settling, it should also, if the joints are briefly flushed after using the area with boiling water. Do not use vinegar cleaners or limescale removers when cleaning hard joints; they will dissolve the lime from the grout and make it brittle!