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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

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

Surface material

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

Service levels

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

Related Case Studies

One building, four surface types! Our system works its magic across all four.

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.

Read full case study

Going for gold – returning Cotswold stone to its former glory

The render, stonework, sills and coping stones on The Grove had become scarred with algae and needed to be cleaned. We won the contract because of the high standard of our work, our professional approach and competitive rates.

Read full case study

Contact Us

Send us your contact details and a member of our team will be in touch to discuss your requirements. If you upload an image of the surface you want cleaned we can provide you with an indicative quote.  

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Some of our clients

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Client Testimonials

“I just wanted to let you know that we are on site today and think that the building is looking so much better, so thank you very much for that.”

Anita Pitts - Hartwell House

“The works surpassed my expectations! I will have no problem referring you to my friends and business associates.”

Andy Lane - Lane Pearson Automotive Group Ltd

“The offending Graffiti was removed without trace using pressurised steam.”

Lucy - Jones Lang LaSalle

“The work was carried out to a very high standard and we would not hesitate to use you again.”

Cathering Stott - Eunomia Research & Consulting

“I was very impressed with the finish your company produced and how quickly you managed to do it.”

Tom Brady - MD Building 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

Our Accreditations