These photographs were from earlier in the year at a residence in Achurch which had a number of paved areas and patios which like any patio in the UK had discoloured over winter and the colours in the stone had become grey and un-inviting. Being a Tile Doctor and Carpet Cleaner requires an investment in high pressure cleaning equipment which lends itself well to external patio cleaning.
Patio Pressure Washing
With less preparation required when working outside to protect other surfaces I was soon setup and started by applying a strong dilution of Tile Doctor Pro-Clean which is a multi-purpose cleaner and stripper which being an alkaline rather than acidic product is safe to use on stone, tile and grout. The solution was left to soak into slabs for a while so it could get to work the grime and it was then scrubbed in using a yard brush. The next step was to use a high pressure washer running at a medium pressure so as not to blow out the mortar between the slabs. The pressures available on the truck mounted pressure washer are much higher than those available on domestic machines so you do have to be careful.
The job took half a day and I think you will agree the patio now looks newly laid.
Source: Patio Cleaning in Northamptonshire