The selection of the right process is prerequisite for the preservation of valuable stonework.
Sandstone on facades and in vaults is therefore cleaned by low-pressure blasting, harder granite on facades and in stairwells with the appropriate measurement of sand or vacuum blasting (primarily in living areas).
Clinker bricks of different hardness on facades, bridges etc. also with low-pressure blasting which can be appropriately gauged.
The cleaning/repair procedure:
|Removal of graffiti