Trusted by Cork Locals Professional Wall Cleaning in Cork

Render Cleaning and Exterior Wall Washing in Cork

I am Donal O'Sullivan, owner of Cleaning Doctor Cork. We use specialist soft wash methods to safely remove algae, moss, and dirt from external walls without damaging render or mortar.

Soft Wash Method

K-Rend Safe

Removes Algae & Moss

All Wall Types

087 258 1681 064 664 3966 WhatsApp Get a Quote

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↓ See Our Process

Areas I service: Blarney, Carrigtwohill, Cloyne, Coachford, Cobh, Glanmire, Little Island, Midleton, Rathcormac, Tower, Watergrasshill, Youghal

Donal O'Sullivan

Owner & Operator

Wall
Expert

Rated Excellent by Cork Locals

      EXCELLENT  
   Based on 40 reviews 
    
 
 
 
   
 
 
      Posted on Google  
   
   Gearoid Terry 
 10 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Had a great experience with Donal the Cleaning doctor. He cleaned my property after an oil spill & we were very happy with the results. His crew were efficient & went above and beyond for us. Also a great communicator.
  
 
     Posted on Google  
   
   Cathriona o'Shea 
 18 days ago
 
 
 Trustindex verifies that the original source of the review is Google. If it is possible to award more than 5 stars I would. They did a top class job for us  we are very thankful and would highly recommend. Donal called out to access the job. Then  Ian and Paul power washed the whole house and footpaths.  Also the roof was treated for moss. Donal painted the chimney.  A lovely pleasant and obliging team.
  
 
     Posted on Google  
   
   Geoff Kelly 
 27 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Very happy with the service provided. Communication was excellent from the start and the staff were professional, courteous and did a brilliant job. I would highly recommend this service
  
 
     Posted on Google  
   
   Daniel Buckley 
 42 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Donal has been coming to clean outside my house for the 2nd year now, and the work is always immaculate. Very professional, reliable, and thorough every time. Highly recommend him and his team!
  
 
     Posted on Google  
   
   Frank Houttave 
 44 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service from Cleaning Doctor. Donal and his team have been very professional, reliable and easy to deal with. The quality of the cleaning has been consistently excellent, and everything was done exactly as agreed. I’m very happy with the service and would definitely recommend Cleaning Doctor to anyone looking for a reliable and professional cleaning company.
  
 
     Posted on Google  
   
   Amelia O'Reilly 
 44 days ago
 
 
 Trustindex verifies that the original source of the review is Google. We have had the pleasure of working with Donal and the team at Cleaning Dr on a number of jobs for Croninwall Properties and we have always been extremely impressed with the results.

Donal is a pleasure to deal with. He’s professional, reliable and takes the time to explain in detail what works are required and ensures everything is completed to a very high standard.

Every job Donal and his team have completed for us has turned out exceptionally well and we wouldn’t hesitate to recommend them.
  
 
     Posted on Google  
   
   Ger Sheehan 
 46 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Great service and professionalism
  
 
     Posted on Google  
   
   Dave Morrissey 
 47 days ago
 
 
 Trustindex verifies that the original source of the review is Google. 
  
 
     Posted on Facebook  
   
   Carole Conway 
 168 days ago
 
 
 recommendsTrustindex verifies that the original source of the review is Facebook. We recently had our roof, tarmac, footpaths, kerbs, and patio professionally cleaned and treated, and the results were absolutely outstanding. From start to finish, Donal and his crew were incredible to deal with.

They worked tirelessly over several days, arriving early each morning and maintaining a consistently high standard of professionalism throughout. Not only was their work ethic impressive, but they were also genuinely pleasant and easy to have around — something that really stood out.

The transformation of our outdoor areas has been remarkable. Everything looks refreshed, spotless, and well cared for. It’s clear they take great pride in what they do, and it shows in the final result.

I would highly recommend their services to anyone looking for this type of work. Wishing Donal and his team continued success — we certainly won’t be looking anywhere else in the future!
  
 
     Posted on Google  
   
   Carole O'Keeney 
 168 days ago
 
 
 Trustindex verifies that the original source of the review is Google. We recently had our roof, tarmac, footpaths, kerbs, and patio professionally cleaned and treated, and the results were absolutely outstanding. From start to finish, Donal and his crew were incredible to deal with.

They worked tirelessly over several days, arriving early each morning and maintaining a consistently high standard of professionalism throughout. Not only was their work ethic impressive, but they were also genuinely pleasant and easy to have around — something that really stood out.

The transformation of our outdoor areas has been remarkable. Everything looks refreshed, spotless, and well cared for. It’s clear they take great pride in what they do, and it shows in the final result.

I would highly recommend their services to anyone looking for this type of work. Wishing Donal and his team continued success — we certainly won’t be looking anywhere else in the future!

Award-Winning Service

See the results...

Real examples of our wall cleaning expertise.

Our Process

Safe & Effective Soft Washing

We use a gentle chemical treatment process to clean your walls without high pressure.

1. Soft Wash Treatment

We apply a specialist biocide cleaning solution to the wall using low pressure. This breaks down the algae and dirt at a microscopic level.

Gentle Application: No damage to render

Kills Roots: Prevents rapid regrowth

Safe: Approved biodegradable chemicals

2. Controlled Rinse

After the treatment has dwelled, we gently rinse the surface with low pressure steam or water to reveal the clean, original finish.

Low Pressure: Protects mortar & pointing

Bright Finish: Instantly visible results

K-Rend Safe

Recommended cleaning method.

Long Lasting

Stays clean for years.

My professional accreditations

Why Choose Us For Walls?

The benefits of our professional external wall cleaning services.

Remove Algae

We specialise in removing red, green, and black algae that stains render and brickwork, restoring the original colour.

Safe Soft Washing

We use low-pressure "Soft Wash" technology to clean delicate surfaces like K-Rend without causing damage.

Prevent Damage

Moss and algae hold moisture against the wall, which can lead to damp penetration and frost damage if left untreated.

All Surfaces

We clean all exterior surfaces including render, pebble dash, brick, natural stone, concrete, and cladding.

Long Lasting

Our biocide treatments kill the root of the algae, meaning your walls stay cleaner for much longer than pressure washing alone.

Improve Kerb Appeal

Clean walls instantly brighten up your property, making it look well-maintained and increasing its value.

Price Promise

The price quoted includes all labour, equipment, and cleaning solutions – no hidden extras.

Fully Insured

We carry full public liability insurance, giving you complete peace of mind while we work on your property.

Dealing with stubborn moss? See our dedicated treatment →

Before & After

Real examples of walls we have cleaned. Click any image to enlarge.

BEFORE

AFTER

Wall Algae Removal

BEFORE

CLEAN

Wall Cleaning

BEFORE

RESTORED

Render Restoration

Frequently Asked Questions

Common questions about our wall cleaning services.

Will cleaning damage my render?

No. We use a specialist "Soft Wash" method for rendered walls. This relies on cleaning agents rather than high pressure to remove dirt and algae, ensuring the delicate surface of the render is not blasted away or damaged.

Does it remove red streaks (algae)?

Yes, absolutely. The red staining often seen on light-coloured walls is Trentepohlia algae. Our treatment is specifically formulated to kill this algae and remove the red staining, restoring the wall's original bright colour.

How long will the results last?

Because our treatment kills the root of the biological growth, the results last much longer than simple pressure washing—typically 2-5 years depending on the location and environmental factors.

Is the chemical safe for my plants?

We take great care to protect your garden. We pre-wet and rinse down all nearby plants to dilute any overspray, and can cover sensitive areas. Once dry, the treated surface is harmless to pets and plants.

Can you clean brick and stone?

Yes, we clean all types of masonry including brick, natural stone, and concrete. We adjust our method to suit the material, ensuring a deep clean that removes carbon deposits, moss, and algae without damaging the pointing.

Let's Chat

Fill in the form, and I'll get back to you personally with a quote.

087 258 1681

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Cork & Surrounds

Donal O'Sullivan

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Donal O'Sullivan

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Trusted by Cork Locals Professional Wall Cleaning in Cork