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Render Cleaning and Stone Cleaning Using a DOFF Steam Cleaning System

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Cleaning: Exterior render cleaning and stone cleaning using a DOFF Steam Cleaning System

and long reach poles.

Access:  Customer to provide scaffold & MEWP


WFP: An exclusion or warning zone will be set up around the area of work using cones; tape and warning signs will be posted in any area where a hosepipe crosses a walkway, to warn of a potential trip hazard.
Assess the situation prior to commencing work. Ensure that there is no danger to the public – cordon off areas if required.
Ensure that the poles will not come into contact with any electric cables or overhead power lines.
Ensure that any falling residue water does not create a danger of slipping. You must use De – Ionised water when using water fed poles.
Poles are extended at ground level sufficient to reach the high level windows or building fabric.
Poles over 15 metres overall length require x2 operatives to extend the pole to the correct height to avoid manual handling issues.
DOFF: Only Stonehealth approved operator to use the Doff equipment.
All areas that are cleaned using the DOFF will involve a small amount of water pooling nearby.
Safety signs and barrier tape MUST be used to safely cordon off your work areas.
Steam cleaning at extremely low pressure – 50 BAR MAX with water flow of only up to 5 litres per minute will completely remove all organic matter and atmospheric pollution, from the surface of the area cleaned.
Site: The site must be kept in good order whilst working – any tools and equipment must be left inside the works van or inside the cordoned off area whilst working on site. All items to be removed once works completed.
Softwash System: Soft washing solution which contains sodium hypochlorite mixed at 2% with greenwash at 1% and Terra Wash at 1% and Rain Fresh at 1% to be applied to the render under a controlled method via water fed pole to minimise any overspray. The mixture is blended in a purpose-built Blend 50 Softwashing system module located on the ground which allows the operatives to have the correct mixture at all times. The blend 50 module creates a mixture of 2.0% Sodium hypochlorite, 1.0% Green Wash, 1.0% Terra Wash and 1.0 % Rain Fresh, highly diluted with 95% Water which gives a mixture of approximately 12.0 litres softwashing solution from which 11.4 litres of water to 0.6 litres of sodium hypochlorite, terra wash, green wash and rain fresh per minute.
The soft washing solution is neutralised with Final Wash and then steam cleaned which removes surface contaminants left behind. The Final wash is mixed by the Blend Module at 2.0% with 98% Water which gives us 11.8 litres of water and 0.2 litres of Final Wash per minute.
All surfaces to be treated with Final wash which neutralises the softwash solution.
Satisfaction Sheet: Once all works have been finished to a high standard please ensure satisfaction sheet be signed off.
Suitable water proof clothing, footwear and eye protection should be used.

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What our Clients Think

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  • Both jobs were completed to a standard beyond our expectations, especially the cladding clean. We, our Client and the school are all very impressed with the way it cleaned up, someone actually thought it had been replaced.

    Excellent job, thanks to you and your operatives

    J Andrews Hard Services Manager

  • Excellent team, would highly recommend

    Amanda Laverick Manager
    Thorpe Underwood Estate, York

  • The operatives gave me the impression that they were knowledgable, conscientious and hardworking; and kept me informed.

    Shaun Barnett Planned Maintenance Manager

  • We used Purple Rhino for the first time in 2014 , very prompt service, great job done in cleaning the outside of our 15000 sq ft building , would certainly recommend Purple Rhino

    Gary Kersey
    European Flavours & Fragrances PLC, Hertfordshire

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