In many cases the grouting between your patio slabs has become loose, degraded. When resin (jointing mix) has been used this is often very soft and when pressure washed it can be removed easily. To combat this problem we offer a chemical 'soft wash' option which eliminates the need for high pressure washing. An example is the image above. This was badly stained old cream slabs and although looked better after pressure washing, still had deep stubborn stains and lichen embedded in the stone surface. 

As you can see in the photo below, the right section has been treated and the staining removed. This process can be used in the 'soft wash' process but without the high pressure washing.