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Surface Materials

 

Render

Render often becomes discoloured as a result of environmental and organic pollutants. Care must be taken when cleaning render to ensure that the surface is not broken or compromised.

Where Used

Where Used

Render is applied to external walls to achieve a smooth or textured surface. 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 risistant and resilient surface. 

The primary cause of the discoloration of render is the growth of a biofilm - a mixture of moss, algae and lichens. Many factors influence the growth of a biofilm including; the direction of the building, the ph of the surface, moisture levels and temperature. As a result different facing rendered facades may have a different type of biofilm growth.

We clean; StoRend, Parex, K Rend, Weber, Wetherby and Monocouche. 

Cleaning Method

Cleaning Method

We usually follow a three-step cleaning process on render cleaning projects. We start by cleaning the surface using our SteamPLUS technology - 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 is particularly effective at killing the algae and moss that has become ingrained into the render. It also contains a fungicide which helps ensure eradication of spores. A final clean, again using SteamPLUS, leaves the surface looking as good as new. 

By using our SteamPLUS system the render dries quickly which means that moisture is not driven deep into the render. If water penetrates it can become trapped and subsequently freeze and then expand during the winter months.  The frozen moisture expands and causes cracking or blowing which can lead to costly repair work.

Because SteamPLUS produces steam at 150°C it kills the surface based spores along with any other living organic materials.

SteamPLUS cleans gently and so does not cause the scarring and damage that is frequently associated with traditional jet washing methods.

 

Specialist access Arrow

Our expertise in specialist access allows us to deliver brilliant exterior surface cleaning regardless of the complexity of a project.

Surface material Arrow

An in-depth understanding of different building materials means we can achieve outstanding results whilst mitigating risk of damage.

Service levels Arrow

Our aim is to raise-the-bar in the cleaning industry and deliver the very highest levels of customer service.

Related Case Studies

Render cleaning: a cost-effective alternative to painting cycles

When our client asked for advice on an alternative to repainting a residential development, we knew how to save them time and money.

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Royal makeover for Princes Court

Princes Court is an elegant residential development in the village of Tetbury, in the Cotswolds. OneFifty worked its exterior cleaning magic to  return the building to its former glory. 

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K-Rend render cleaning in Portishead

When Jones Building Group needed a reliable exterior building cleaning company to clean the building’s K-rend render, wooden cladding and glass before beginning planned maintenance work, they contacted us.

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Our system works its magic on wood, brick, render and cement. r .

St George's Heights is a modern apartment block located in Redfield, in South Bristol. The building façade is made up of four different substrates; wooden cladding, brick work, cement and K Rend render. Each of these surfaces requires a slightly different method of cleaning which was no problem for our cleaning system.

Read full case study

Transformational cleaning at a fraction of the cost of repainting

The Water’s Edge occupies a prime waterfront position in the exclusive Knap area of Barry in Wales. These attractive, white rendered apartments have stunning views over Heritage coastline, including the Bristol Channel and the Somerset coastline. Unfortunately, there is a downside of this wonderful location.

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Render Cleaning Services across the UK

London | Manchester | Birmingham | Liverpool | Leeds

 

Facade Cleaning Services across the UK

London | Manchester | Birmingham | Liverpool | Leeds

Some of our clients

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Client Testimonials

“They did a really great job of cleaning the high-level cladding on the building. I know that they offer a range of cleaning services and I will definitely be using them again in the future. ”

Christopher Haswell - Project Manager - Maddox Construction

“Excellent to deal with from start to finish, very professional in their attitude and kept us informed at every stage. ”

Esther Hunting - Warwick Estates

“Thank you to you and your team for delivering such high standards of service whilst representing RelyOn.”

Jason Husk - RelyOn Services

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

Wendy Tomlinson - Senior Conservation Officer, Cheltenham Borough Council

“Thank you for sending the photos, it all looks amazing! ”

Robbie Irens - Gordon and Co

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

Lloyd - Lambert Smith Hampton

Our Accreditations

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