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Regenerating the Generator Building

The Generator Building is a striking red brick and stone building located on Finzels Reach by Bristol’s floating harbour. It originally housed the generator for Bristol’s tram system, now it has now been given a new lease of life as state-of-the-art offices.

Unfortunately while the building was empty, graffiti vandals got to work defacing the walls, facias, soffits and roof lantern with unsightly tags. OneFifty was enlisted to help remove the graffiti.  

Expert cleaning, minimum risk

For the OneFifty team cleaning the graffiti off the walls at ground level was a pretty straight forward task, however removing the tags on the soffits and facias of the roof posed numerous challenges. 

We have a range cleaning systems each suited to dealing with different types of contaminant and surface substrate. After years of experience in removing graffiti we can recommend and employ the most effective method of cleaning while minimising risk of damage to the surface.

Media blasting, using a very gentle media, was effective for removing the tags from walls at ground level, however this method could not be used for the high level cleaning - reaching and removing the tags at the top of the building required a different approach.


As experts in high level access, with IPAF and IRATA trained operatives, we have a number of options for reaching high up, difficult to reach spaces to give them a thorough clean. 

With 20 years in the business, our rope access team has both knowledge and experience of using ropes to work at high level. Our combined expertise made us a go-to solution for this tricky project.

How to treat a tricky substrate

One element of the high level cleaning involved removing graffiti from a lead soffit at the very top of the building. Lead is an extremely reactive material, we needed to get the cleaning method right so as to not trigger a reaction which might discolour the lead.

In addition, one of the tags was done in black paint on very old brickwork and the paint had leached into the brick making it extremely difficult to remove. The tag was located at the very end of the building making it difficult to access. Using pressurised steam at 150 degrees, plus skill and determination, we managed to remove this stubborn tag.  

Achieving the best outcome for our client

Despite the challenges associated with access and fragile substrates we were able to complete the graffiti removal safely and efficiently and achieve the best possible outcome. We are proud to have played a small part in the regeneration of this iconic historic building and, importantly, our client was absolutely delighted with the work.

The images below tell the story - so do take a look through. If you require any more information about hi-level graffiti removal contact Max on 0333 234 1445 or email

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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

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

Lucy - Jones Lang LaSalle

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

Elaine Whitfield - Consort Property Management

“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

“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

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

Will Mellor - Knight Frank

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