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Algae

Algae requires moisture to grow and reproduce so it thrives in damp, sheltered or shaded areas. Growth tends to be more significant in autumn and winter, but can happen at any time if the surface is persistently damp and shady. Algae can be different colours - such as red, green and black - depending on the environment that it grows in. Algae near the seaside often appears red in colour due to marine salts in the atmosphere.  

In the built environment algae typically affects hard exterior surfaces such as stone or brick façades or block paving, It creates unsightly stains and can contribute to the degeneration of the surface material. It can also make exterior terraces, pathways and steps slippery and potentially hazardous.

Cleaning

We follow a three-step approach to cleaning algae; a first pass, to clean the surface layer of algae using SteamPLUS. Then we apply a special render wash to even out the surface followed by second pass with SteamPLUS to complete the cleaning process.

Prevention

Algae spores are air-bourne, therefore algae can be a persistent problem on any damp and shady exterior surfaces. To address this issue we apply a growth inhibitor that helps discourage re-growth and keeps the surface clean for longer.

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Related Case Studies

Returning Cotswold stone to its former glory

The render, stonework, sills and coping stones on The Grove had become scarred with algae and needed to be cleaned. We won the contract because of the high standard of our work, our professional approach and competitive rates.

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Algae removal for San Lorenzo Court

When the walls of San Lorenzo Court - a contemporary retirement development in Saint Ives, Cornwall - became stained by unsightly black algae OneFifty knew exactly what to do.

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Tried and tested nationwide cleaning

Regular exterior cleaning for Big Yellow Self Storage has allowed us to stress-test our nationwide service and ensure that we are hitting the mark for quality of cleaning, timeliness of delivery and customer service.  

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Transformational cleaning at a fraction of the cost of repainting

The Water’s Edge occupies a prime waterfront position in the exclusive Knap area of Barry in Wales. These attractive, white rendered apartments have stunning views over Heritage coastline, including the Bristol Channel and the Somerset coastline. Unfortunately, there is a downside of this wonderful location.

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Major project carried out with minimum fuss

OneFifty was contracted to carry out external cleaning of a sizeable office premises in Temple Quay. Using cherry pickers and ropes we were able to reach and clean every inch of the building exterior.

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Contact Us

Send us your contact details and a member of our team will be in touch to discuss your requirements. If you upload an image of the surface you want cleaned we can provide you with an indicative quote.  

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Some of our clients

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Client Testimonials

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

Les Richards - Board member of the RTM

“The works surpassed my expectations! I will have no problem referring you to my friends and business associates.”

Andy Lane - Lane Pearson Automotive Group Ltd

“I just wanted to let you know that we are on site today and think that the building is looking so much better, so thank you very much for that.”

Anita Pitts - Hartwell House

“The work was carried out to a very high standard and we would not hesitate to use you again.”

Cathering Stott - Eunomia Research & Consulting

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

Lloyd - Lambert Smith Hampton

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

Joe - Hillcrest Estate Management

Our Accreditations