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Commercial office clean - London

Stratford’s Gredley House in north east London is a five-storey detached office building on the busy Broadway road.

The building’s managers asked OneFifty to clean 400 square metres of the light lower stonework on the building that had become stained and dirty by carbon and algae. We also cleaned the stone arch that opens into a central courtyard so visitors and office workers would be greeted by a bright, clean entrance way.

Tackling lintel algae

Gredley House has four metres of light coloured concrete wall beneath the rest of the building’s red brickwork. Algae was growing on the concrete lintels and areas below the lintels had also become marked with algae that had formed on rain runoff. This, plus general atmospheric pollution, was making the building look grubby and uncared for.

Lintels offer an ideal environment for algae to grow as they stay damp due to the water that accumulates on them.

We used our state-of-the-art steam cleaning technology to clean the lintels and walls, and applied a biocide to help inhibit algae regrowth and keep the surfaces cleaner for longer.

Out-of-hours working

As Gredley House is a dedicated office building we carried out the work over the weekend in order to minimise disruption to the building’s users.

Our team arrived on Friday night to assess what needed to be done and formulate a plan of action. Armed with a plan and a good night’s sleep they started work at 6:30am on Saturday morning to clean the area around the bank ATMs before the Saturday morning rush – thus minimising any inconvenience to the bank’s customers.

They then worked on the areas within the Gredley House courtyard, transforming the look of the building as well as protecting surfaces from future algae regrowth.

The management company was so impressed by our flexible approach to working and the results that we achieved that they have asked us to clean the upper levels of the building.  

For more information about exterior surface cleaning contact Max or Andy Morris on 0333 234 1445 or email your enquiry and we will get back to you as quickly as possible.




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Some of our clients


Client Testimonials

“One Fifty from top management, costings and most importantly site crew were extremely professional and did a very good job.”

Tim Hanley - Lake Edge Ltd

“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

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

Jason Husk - RelyOn Services

“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

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

Wendy Tomlinson, Senior Conservation Officer for Cheltenham Borough Council

“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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