Render Cleaning Services in Aller
Breathe New Life Into Your Walls – Professional Render & Exterior Wall Cleaning That Works
The discolouration on rendered walls is typically caused by organic growth, such as algae, lichen, and fungus. While this growth is unsightly, it can also trap moisture against the surface, potentially leading to damp and long-term degradation.
Robin Ray Exterior Cleaning treats the root cause. Our specialised softwashing process safely kills and removes this growth, restoring your property's appearance and protecting your render. The result is a 'like-new' finish, avoiding the need for costly and disruptive redecoration.
Why Exterior Wall Cleaning Is More Than Just Cosmetic
What looks like dirt is actually a living biofilm — colonies of algae, lichen and mould that feed on your rendered or painted walls. Left untreated, these growths can shorten the lifespan of your surfaces and lead to cracks, moisture retention, and even structural damage.
Robin Ray Ltd uses a low-pressure softwash system to eliminate this growth at the root. It’s safer than pressure washing and is recommended by render manufacturers like K Rend and Webber. It can make walls look like new in just one day.
What We Remove During Cleaning
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Green, red and black algae
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Lichen, moss and mould
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Pollution and weather-related staining
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Organic build-up near trees or plants
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Surface-level grime, debris and biofilm
Tel: 01364 716127
Mob: 07928 818 031
Tailored Cleaning for Every Wall Surface
Render isn’t one-size-fits-all. That’s why we assess every property before cleaning. Whether you have K Rend, monocouche, silicone, cement, painted render, or pebbledash, we choose the safest, most effective method.
We offer several render cleaning options: Instant Clean, Slow Clean, and Clean & Protect, all designed to meet different needs, surface types, and budgets. We can also apply preventative treatments to help your walls stay cleaner for longer. For peace of mind, test patches are available so you know exactly what to expect.
FAQs – Render & Wall Cleaning Explained
What is softwashing?
Softwashing uses specialist solutions with low-pressure water to safely remove algae, lichen, and dirt from walls without surface damage.
Is it better than pressure washing for render?
Yes. Pressure washing can erode render. Softwashing cleans deeply and gently while helping to prevent regrowth.
Do I need to repaint after cleaning?
In most cases, no. Softwashing restores the surface’s appearance. For painted render, cleaning helps ensure any new paint adheres properly.
Are your products safe?
All cleaning products carry some risk. We take full precautions to protect you, your property, and the environment throughout the process.
Do you offer free quotes and surveys?
Absolutely. We provide in-person surveys, free written quotations, and test patches upon request.
Sand & Cement Render Cleaning
Sand and cement render is one of the most common wall finishes but also one of the most prone to algae and weather damage. Its porous surface holds moisture which allows green and black staining to develop over time.
At Robin Ray Exterior Cleaning we use a low pressure softwash system to clean sand and cement render safely. Unlike pressure washing our method removes organic growth and surface grime without eroding the material. The result is an even finish that restores your render’s natural appearance and helps prevent future staining.
Painted Render Cleaning
Painted render needs careful maintenance to stay in good condition. Algae and dirt can grow beneath the paint which leads to bubbling cracking or peeling if not treated correctly. Our painted render cleaning service removes this build up gently before it causes lasting damage.
We use softwashing and eco friendly cleaning products to restore painted surfaces without harming the coating or colour. Cleaning first extends the life of the paintwork and avoids the cost of early repainting which keeps your property looking clean and protected.
9 Things Every Homeowner Should Know
Before Cleaning or Painting Their Exterior Rendered Walls
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True Render Cleaning Specialists
With decades of experience, we know how to treat every surface safely, delivering powerful results without causing damage.
Tailored Softwash Treatments for Every Surface
We clean from the ground using low-pressure systems suited to delicate finishes, ensuring the best clean for each wall type.
Fast, Impressive Results with Minimal Disruption
Our softwashing process can often transform walls in a single visit, no scaffolding, no mess, and long-lasting results.
Get Your Render or Wall Cleaning Quote Today
If your walls are stained, tired, or covered in algae, get in touch with Robin Ray Ltd today.
We’ll provide expert advice, a free quote, and a cleaning plan that makes your property look its best, safely, affordably, and without disruption.
Tel: 01364 716127
Mob: 07928 818 031
Related Services
Render Cleaning
Client Comment
Aller
Declan Barker
Render Cleaning
Client Comment
Aller
Fantastic job from start to finish. Our render had black streaks all down the back wall – now completely gone.
I would happily recommend Robin Ray Exterior Cleaning to anyone needing this kind of service.
Jake Simmons
Render Cleaning
Client Comment
Aller
The walls of our house were covered in grime, moss and some red algae that just wouldn’t budge with regular cleaning. Robin used his low-pressure system and managed to remove every bit of it without causing damage.
The property looks transformed. We’ve already booked him for future maintenance!
Katie Holman
Render Cleaning
Client Comment
Aller
I contacted Robin because of his experience with softwash cleaning. Our side walls were covered in grime and algae, and other companies had turned us down due to access issues.
Robin’s equipment allowed him to reach every part without hassle. The job was done with care and precision, and the finish exceeded our expectations. We’re very happy with the outcome.
Martin Blackwell
Render Cleaning
Client Comment
Aller
I didn’t realise how bad our render had become until Robin Ray Ltd worked their magic. They completely removed the algae and staining without pressure washing.
We were really impressed with the attention to detail and how thorough they were. Our walls now look newly painted — we couldn’t be happier.
James Cutler
Render Cleaning
Client Comment
Aller
After a lot of research, we chose Robin Ray Ltd for our render cleaning and couldn’t be happier. The walls had black mould and patches of algae that were spreading fast.
Robin was very thorough in his assessment, explaining what type of treatment would work best. He carried out a softwash that removed every bit of staining without harming the render. The walls look freshly painted, and there was no need for scaffolding. Professional, responsive and worth every penny. I’d absolutely recommend them to friends and family.
Sam Fielding
Render Cleaning
Client Comment
Aller
Booked for a render clean – really pleased. No pressure washing damage and it looks great again.
Ben Fletcher
Render Cleaning
Client Comment
Aller
Robin arrived on time, explained the process clearly, and the end result was excellent. Render looks fresh again.
Liam Andrews
Render Cleaning
Client Comment
Aller
Our rendered walls were looking really neglected and I thought we’d have to paint them. But Robin Ray Ltd completely cleaned them using a softwash solution and now they look brand new.
Highly recommend this service – saved us a lot of money.
Bethany Holt
Render Cleaning
Client Comment
Aller
We had serious black and green stains on the render that looked awful. Robin Ray Ltd treated it with care and now the house looks like it's just been painted.
Great communication and tidy service.
Hannah Miles
Render Cleaning
Client Comment
Aller
Robin provided us with an in-person quote and walked us through the different cleaning options. We chose the Instant Clean & Protect and couldn’t be happier.
He removed thick algae and years of grime with a method that didn’t damage the walls or surrounding plants. He also applied a preventative treatment to help slow the regrowth. It’s a complete transformation. Excellent service from someone who genuinely knows his stuff. Highly recommended.
Darren Jennings
Render Cleaning
Client Comment
Aller
Top class service. From first contact to finished job, everything was smooth and professional.
Our render was full of dark stains and looked awful. Now it’s bright and clean again. The team were tidy, polite and very respectful of our property throughout the day. We’re really happy with the result.
Callum Briggs
Render Cleaning
Client Comment
Aller
Friendly team, turned up on time, and got on with the job. Render looks like new again – would recommend.
James Goddard
Render Cleaning
Client Comment
Aller
We’ve had render cleaned before by another company, but they didn’t get near the results Robin achieved. He clearly knows how to deal with different surface types and took the time to assess our render before choosing the best method.
His softwash cleaned deeply without any surface damage, and he even removed black spots I thought were permanent. The house now looks sharp, modern and well cared for. Top-quality work, and a pleasure to deal with.
Alexandra Pritchard
Render Cleaning
Client Comment
Aller
I didn’t realise how bad the render had got until Robin cleaned it. It looked like a completely different house!
The staining was gone, and the softwash left a really nice even finish. They worked carefully around windows and pipes. Very impressed with the level of service and attention to detail. Worth every penny.
Ethan Savage








There was a thick buildup of red and green algae on our side wall that looked horrible. Robin removed every trace and even explained how to reduce regrowth.
The house is totally refreshed now. We’ll be using them again for future maintenance.