Old tiles do not necessarily have to be chipped - they can easily be plastered if a tile structure is no longer desired in the respective area. In damp rooms, however, care must be taken to use waterproof plaster or to take protective measures in areas where there is a risk of splash water.
Rolled plaster on tiles - that's how it works
Since roll-on plaster usually only has a very thin layer, it cannot adequately cover unevenness. The tiled wall must first be completely smoothed with a suitable filler (€ 4.25 at Amazon *). Especially the joints must be cleaned clean to obtain a real level surface, which can then be applied later the plaster. After drying the putty, a primer with a suitable depth basis (€ 4.81 at Amazon *) should take place. Which is best used, especially the type of plaster, which should then be applied. Special caution is required if lime plaster is to be used - he is also well suited for sanitary areas, but in any case needs a suitable depth reason! After drying the depth reason, then can be plastered with the rolling plaster. Nevertheless, nothing special needs to be considered, in tiles can otherwise be completely plastered.
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Suitable plaster for damp rooms and for the bathroom
Basically, vapor-permeable plasters that can also absorb humidity, such as lime plaster, are suitable for damp rooms. Lime plaster also has the advantage that it is particularly mold-resistant, meaning that serious moisture damage can be avoided very easily. On the other hand, plaster is not suitable for splashing water - here, tiles are clearly the means of choice. The only exception is the Tadelakt, which has also been rediscovered in this country for a few years. It is a special lime plaster mixture that originally comes from Morocco and, after being applied by a specialist, is compacted with stones and polished. This type of plaster is expensive, but it is the only way to make a really seamless bathroom design possible in all areas.