Why the cleaning method matters
Sandstone surfaces vary in condition and porosity. The appropriate method depends on the stone, the type of soiling, previous treatments and the desired finish. For this project, the team used water with diamond abrasives rather than a chemical cleaner.
Before treating another sandstone surface, we would assess it and select a suitable method. Contact Stone Rescue to discuss exterior sandstone cleaning or restoration.
What this project shows
The exterior paving extends over a substantial area, so the cleaning approach had to be suitable for the surface as a whole. The project photograph shows equipment, water and the sandstone paving during the work. It helps explain why the job involved more than washing a small isolated patch: a consistent treatment matters when adjacent sections of stone will be viewed together.
Machine-mounted diamond abrasives work directly on the surface, while water supports the process. The exact grade and pressure should be selected for the condition of the sandstone. This page documents the method used on this south London project; another paving area may need a different approach after its stone, joints and previous treatment have been checked.
Discussing an exterior sandstone floor
When contacting Stone Rescue, include the approximate area, location and photographs of the whole surface as well as the areas with the most visible soiling or wear. If you know whether the paving has been sealed or cleaned with chemicals before, that background can help with the assessment. The photograph and video on this page give a visual reference for the equipment used here, while the right method for your own sandstone depends on its current condition.
