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Surface Materials - Render

 

Render Cleaning

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 Is Render 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 resistant 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 amongst others:

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

Cleaning Render - The Method

We usually follow a three-step cleaning process on render cleaning projects. We start by cleaning the surface using our steam cleaning 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 steam cleaning, leaves the surface looking as good as new. 

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

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

 

Related Render cleaning Case Studies

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. 

Read full case study

Bristol graffiti cleaning

Following St Paul's Carnival in Bristol, Portland Heights needed rapid graffiti cleaning to remove obscene words sprayed onto the building's exterior.

Read full case study

Façade cleaning for Oasis Academies

Oasis is one of the largest Multi-Academy Trusts in England. OneFifty was delighted to be asked to clean the façades of two of their Academy buildings.

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

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Client Testimonials

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

Gary - Lockside Restaurant

“OneFifty are always responsive. Max replies quickly to let me know when one of the team can come out to do the work.”

Lorna Barnet - Director of Barnet Development

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

Tom Brady - MD Building Services

“They were able to remove the remnants of graffiti that had not been removed previously using chemicals.”

Joe - Hillcrest Estate Management

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

Lloyd - Lambert Smith Hampton

“You’ve done a lovely job and we would recommend your services.”

Elaine Whitfield - Consort Property Management

Our Accreditations

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