How to clean paving slabs and roads?

In the case of soiling, it should be clarified whether the soiling is the result of time or recent soiling and, if possible, the cause should be identified. In order to avoid unsatisfactory results, it is a good idea to test the cleaning method on a small area at the beginning, and to expand the area to be cleaned when the desired result is achieved. The paving stones are cleaned of daily dirt with a brush and water. If brush and water cleaning fails, a pressure washer can also be used. In case of sand leaching from the joints, additional sand should be added to the joints if necessary.