Unfortunately, the comprehensive care of external plasters isn’t the most common maintenance procedure. Although any physical damages such as scratches or flaking of the plaster from the wall are usually removed fairly quickly, hardly anyone is cleaning the external plasters. This is a major mistake, because under a layer of dirt the plaster may be damp and the composition of the contamination may include fungi and lichens, which are particularly harmful to any flat external surface. Therefore, it is worth knowing that a dirty facade can be washed. Minor soiling can be removed with a pressure washer and major soiling can be treated with warm or hot, but not boiling water. The cleaning of very dirty facades may be performed by a specialized company with the use of high-pressure washing equipment or a dry-ice blasting technology. Unfortunately it isn’t always possible to remove fungi or lichens this way. In these cases it is necessary to use special formulas that effectively combat this type of sediments. It’s worth remembering that different types of external plaster respond differently to both the soiling and the attempts to remove it, therefore the maintenance works should be carried out based on the guidelines provided by the manufacturer of the plaster. After the removal of the soiling, the facade may be painted. We should also remember about the possible need of priming. Any mechanical damages, such as cracking should be filled as soon as possible, following their prior cleaning and priming. It is important that the filling is of the same type as the plaster and in the case of deeper losses, identical to the reinforcing mass.