Treatment for Red Algae on Walls

We have been providing render cleaning services all over the UK. Our expertise is recognised by homeowners, property managers, and even other cleaning companies that rely on our specialist services.

Professional Render Cleaning Service: Solution for Red Algae on Walls

The Red Algae is actually genus Trentepohlia which would not, at first glance, be taken as a green alga. The free-living species are mostly yellow to bright orange or red-brown in colour, due to the orange pigment, haematochrome (β-carotene). This usually hides the green of the chlorophyll.

The species is terrestrial and is often found in Europe on rocks, walls, and tree bark.

Where they are found on the surfaces of buildings, usually render of some form, they can, if left, cause severe mechanical degradation and deterioration.

Safe and Effective Treatment for Red Algae on Walls

Treatment for red algae on walls comes in the form of low-pressure chemical application so as not to damage the walls. We custom-mix bio-degradable chemicals to suit the type and level of staining.

The treatment for red algae on walls is then applied by specialist pumps at low flow and low pressure. We can work from the ground on most domestic properties, hence reducing the cost of expensive access equipment or scaffolding.

After the treatment, the red or green algae generally die within 24 hours. The wind and the rain then carry on cleaning the building until it is restored to new.

The chemical, whilst bio-degradable, does remain in the fabric of the building and continues to leech out, providing a long-term residual cleaning effect.

What happens if you ignore Red Algae growth on rendered walls?

Beyond aesthetics, allowing red algae to thrive on your walls can have serious consequences.

As the algae spread, it penetrates the wall’s surface, causing gradual degradation. Over time, this leads to:

If you require treatment for red algae on walls, why not call us? All our advice is free.

If you are willing to clean your build yourself, we also offer advice on all aspects of this, from mixing to application rates.

We have travelled all over the UK cleaning various types of buildings, and we feel we are one of the UK’s top render cleaning specialists. We also clean render for other cleaning companies.

If you require treatment for red algae on walls or green algae on render, contact us here for free advice. Our expert team is ready to assist.

Chris Spruce Cleaning Service ltd
SD Office, 491 Wight Moss Way, Southport PR84 ZZ
Phone: 0800 0933 267
Email: info@cleaning-service.uk.com
https://maps.app.goo.gl/9QPmRF5aX8pgREre8

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Treatment for Red Algae on Walls FAQs

Here are some of the most commonly asked questions about our render cleaning services:-

Can I paint over red algae instead of treating it?

No, that’s a mistake. Painting over algae traps moisture, leading to peeling, bubbling, and faster deterioration. The algae will also continue to grow underneath, eventually breaking through the paint. Always treat algae before repainting.

Will chemical treatment change the colour or texture of my walls?

No, if applied correctly. The treatment specifically targets organic matter and does not react with the wall material.

Can different types of wall finishes (e.g., painted render vs. bare brick) impact treatment effectiveness?

Yes, the porosity and composition of the surface affect how well the treatment penetrates. Painted surfaces may repel the chemical, requiring multiple applications or different formulations. Highly porous materials like unsealed brick or roughcast render absorb the treatment better, leading to more effective long-term results.

Can red algae come back in the exact same spots after treatment?

It’s possible, especially if the conditions that allowed it to grow (like poor drainage or excessive shade) are not addressed. However, our treatment has a residual cleaning effect that significantly slows down regrowth.

Connect with Chris Spruce

Meet the Founder: Committed to delivering exceptional results for every property in North-West!

– 20+ years of experience in exterior cleaning.

– Personally involved in every cleaning project to ensure 100% satisfaction.