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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

“As always OneFifty got the job done with no fuss. They’re our go-to supplier for exterior building cleaning.”

Mark Sheffield - Contracts Manager - Jones Building Group

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

Lloyd - Lambert Smith Hampton

“The Jet Washing Company (now OneFifty) deliver the best quality exterior surface cleaning, high quality customer service, and excellent value.”

Will Mellor - Knight Frank

“If we need a job to be carried out at short notice they do everything necessary to make it happen, including getting required approvals to allow them to get on site and get the job done.”

Daniel Boyle - MD of Relyon Services

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

Joe - Hillcrest Estate Management

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

Les Richards - Board member of the RTM

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