Stone facade jet wash cleaning - Carlton House Terrace - Abseil Commercial

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Stone facade jet wash cleaning – Carlton House Terrace

Client Brief

Our client engaged Abco to carry out pressure jet washing to the external surfaces of the London headquarters of Anglo American plc in central London. This building is predominantly clad in Portland stone requiring careful testing of results ahead of full scale cleaning. Works were required to be carried out at weekends only with controlled/policed exclusion zones below the working areas.

Scope of Works

  • Ground level test to heavily soiled external steps
  • Safe rigging to all external elevations & surfaces
  • Carry out a ‘cold’ water pressure wash to the Portland stone external façade of 20 Carlton House Terrace
  • Prune back the vegetation overhanging the rear ‘tower’ from the upper roof gardens


The works were required to be undertaken using standard commercial cold water pressure washing techniques. Cleaning chemicals and suspensions were not to be used on this sensitive site. Careful experimentation was carried out with agitation of heavily soiled areas using hand held brushes which proved successful.

Further challenges we successfully negotiated on this project were:

  • Keeping all entrances operational at all times
  • Managing busy adjacent pedestrian Central London thoroughfares
  • Cleaning to underside of overhanging horizontal surfaces