Client's case

St. Andrew’s Church – Ham

The Sawn Sandstone to the front of St Andrews had not been cleaned since its original installation around 25 years ago. The pathways, and Terrace, to the entrance of St Andrews Church had been reconfigured to allow for a disabled ramp for wheelchair users which has become very slippery and discoloured.

Pressure washing the stone would have removed the slip factor on a short term basis. Given the Sandstone was shaded for most of the day by large London Plane Trees, the algae and other organic growths thrive on shady, damp areas and would have returned within a matter of months. Constantly pressure washing the stone to eradicate the slip factor for church visitors would ruin the surface of the stone and would make the stone more susceptible to frost damage and organic matter.

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