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K-Rend render cleaning in Portishead

At OneFifty we’ve worked with Jones Building Group on a number of cleaning projects, building a strong working relationship with them over the years.

So, 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.

A streaky situation

The block of flats on Kittiwake Drive in Portishead had become badly marked by algae, moss, lichen and organic growth, causing unsightly streaks, especially on the walls under residents’ balconies.

Large areas of the building had become marked black with algae, making the building’s exterior look unsightly and uncared for. Residents’ balconies had also become affected by organic growth, making the surface slippery and unsafe.

Looking after the residents

Before we started work, the residents were contacted asking them to move any plants and furniture on their balconies out of the way, so nothing was damaged during cleaning. Once we’d safely cleared any remaining items to ensure nothing got broken or damaged the team got to work.

Exterior building cleaning

At the rear of the building we used an all-terrain tracked spider boom to reach the top of the block of flats from the lawned area behind the building, preventing damage to the turf while giving us safe access to clean the top of the building. At the front of the flats we used a boom lift to reach the 16-meter cleaning heights.

As part of our cleaning process we treated the exterior building surfaces with a biocide to make sure all organic growth was effectively removed. This also helps to protect the building’s surface by inhibiting regrowth, so the render stays cleaner for longer. In some areas the team applied several coatings of the biocide to make sure all of the algae was properly removed.

Once all the organic growth had been removed we gave the entire building a final steam clean to ensure a pristine finish.

A proper job

We completed our initial building clean in plenty of time, meaning Jones Building Group could start their maintenance works as planned and stay on schedule for the project.

Once Jones Building Group had finishing their work to the building’s cladding we came back to give the building a final clean, focusing on the glass balcony screens and windows, so the residents had a spotless view of their brilliantly cleaned and maintained building.

Mark Sheffield, Contracts Manager at Jones Building Group says of working with us at Kittiwake Drive: 

“We’ve used OneFifty for several years, they’re our go-to supplier for exterior building cleaning. The project at Kittiwake Drive was fairly straightforward and as always OneFifty got the job done with no fuss. They’re very reliable and like Ronseal their exterior building cleaning service does what it says on the tin.”  

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Some of our clients


Client Testimonials

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

Wendy Tomlinson - Senior Conservation Officer, Cheltenham Borough Council

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

Lloyd - Lambert Smith Hampton

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

Lorna Barnet - Director of Barnet Development

“Looks really good, we are very impressed with your state of the art cleaning equipment. Please pass on our thanks to Andy.”

Adam Reynolds - Cheltenham Borough Council

“Great customer service, operatives who clean the windows follow all H&S procedures and do a great job.”

Matt Baker - Soil Association

“Their work is excellent – I recently visited a building that they cleaned for me 18 months ago and it still looks brilliant.”

Daniel Boyle - MD of Relyon Services

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