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Surface Materials - Render


Render Cleaning

Render usually becomes discoloured by environmental and organic pollutants. Care must be taken when cleaning to ensure the surface is not broken or compromised. Pressurised steam cleans render gently; using steam at 150°C also kills surface-based spores, helping prohibit regrowth.

Where Is Render Used

Render is often applied to external walls to achieve a smooth or textured finish. Traditional render is cement based and can be tinted or painted after application. Cement render can also be modified to incorporate acrylic - a mixture of plastic polymers and petroleum, to create a more water resistant and resilient surface. 

The primary cause of the discoloration of render are biofilms such as moss, algae and lichens. Many factors influence the growth of biofilms including, the building's orientation in relation to the sun, the pH of the surface, moisture levels and temperature. 

OneFifty cleans the following well-known brands and more:

  • StoRend
  • Parex
  • K Rend
  • Weber
  • Wetherby
  • Monocouche

Cleaning Render - The Method

We usually follow a three-step cleaning process for render cleaning. We start by cleaning the surface using pressurised steam at 150°C, with pressures as low as 40 Bar. This delivers an impressive yet gentle clean and ensures that all the surface based dirt and algae deposits have been effectively removed.

We then treat the surface with a special render wash which kills any biofilms that have become ingrained into the render. The wash also contains a fungicide which helps ensure eradication of spores. A final clean, leaves the surface looking as good as new. 

Steam cleaning render uses less water than pressure washing and moisture is not driven deep into the render so the surface can dry more quickly. If water penetrates render it can become trapped. It can then freeze and expand during the winter months causing cracking or blowing resulting in costly repair work.

Steam cleans gently and does not cause the scarring and damage that is frequently associated with traditional jet washing methods. Also, using steam at 150°C kills surface-based spores, helping prohibit regrowth. 

Related Render cleaning Case Studies

Algae removal - San Lorenzo Court, Cornwall

When the walls of San Lorenzo Court - a contemporary retirement development in Saint Ives, Cornwall - became stained by unsightly black algae OneFifty knew exactly what to do.

Read full case study

Exterior surface cleaning - Mallard Road Retail Park

We recently cleaned the building façades and paved areas of a Mallard Road Retail Park in Bournemouth.

Read full case study

Warehouse cleaning

We recently cleaned the exterior of a huge warehouse as part of a refurbishment project. Work consisted of cleaning black and green algae off the external metal clad walls, roller doors and brickwork.

Read full case study

Render Cleaning Services across the UK

London | Manchester | Birmingham | Liverpool | Leeds | Bristol


Facade Cleaning Services across the UK

London | Manchester | Birmingham | Liverpool | Leeds | Bristol

Some of our clients


Client Testimonials

“Absolutely spotless and perfectly clean, well done and thank you.”

Lloyd - Lambert Smith Hampton

“Please pass on my sincere thanks to guys for the demo and for getting Neptune cleaned.”

Wendy Tomlinson, Senior Conservation Officer for Cheltenham Borough Council

“Your pressurised hot water system transformed the appearance of our outdoor wooden decking.”

Gary - Lockside Restaurant

“It is refreshing to work with such a dynamic, enthusiastic and reliable team.”

Adam Coombs - Regional Director, Hillcrest

“OneFifty are always reliable, quick to respond and produce high-quality results.”

Lorna Barnet - Director of Barnet Development

“Quite simply a very professional, friendly, family business that provides good value for money. ”

Les Richards - Board member of the RTM

Our Accreditations