Trusted by Bangor Locals Professional Moss & Red Algae Removal in Bangor

Moss Removal and Exterior Red Algae Treatment

I am James Roberts, owner of Cleaning Doctor Bangor. We use specialised biocide treatments to safely remove and prevent red, green, and black algae, moss, and lichen from all exterior surfaces. From Portaferry to Newtonards, we clear moss and algae and treat the surface so it stays cleaner for longer.

Kills Roots & Spores

Long-Lasting Protection

Satisfaction Guarantee

Safe for All Surfaces

07917 275915 WhatsApp Get a Quote

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↓ See Our Process

Areas I service: Bangor, Ballygowan, Comber, Donaghadee, East Belfast, Holywood, Killinchy, Millisle, Newtonards, Portaferry

James Roberts

Owner & Operator

Moss
Expert

Rated Excellent by Bangor Locals

       
   Cleaning Doctor
   70 reviews 
  Write a review     Google    Facebook  
 
 
 
 
 
   
 
 
      Posted on Google  
   
   Calvin Fry 
 7 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Friendly, swift and thorough
  
 
     Posted on Google  
   
   Ian Dancklefsen 
 4 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. +0
James and the guy's were fantastic, great workers and they done a brilliant job very clean and tidy, I would not hesitate to recommend them.
  
 
     Posted on Google  
   
   Delukshan 
 24 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. I can’t speak more highly of James, Ethan and Ivor. They worked solidly for 2 whole days to completely transform our old driveway and patio which was full of weeds creeping through the bricks and stained over years of wear and tear. They then sanded between the bricks to try and prevent the return of the weeds. In addition to this they cleaned our solar panels, treated the roof, and cleaned the external walls of the house including a large stain on the front which I was worried wouldn’t come off. The house looks brand new and several friends and family have commented particularly on the transformation of the patio and paths all around the house. The amount of work they have done in just two days is very impressive. These guys are polite, friendly, professional and just all round lovely people. Thanks fellas - will be using you again in the future for sure and recommending you to others.
  
 
     Posted on Google  
   
   Edward Andrews 
 19 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. Great service, very good communication throughout, very good value. Will definitely use James and the team again.
  
 
     Posted on Google  
   
   Dave Cunningham 
 17 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. I can thoroughly recommend Cleaning Doctor. We received an excellent service from start to finish — reliable, professional and extremely thorough, with real attention to detail.

Everything was carried out exactly as promised and to a very high standard. They were also a genuine pleasure to deal with: friendly, courteous, straightforward and completely dependable.

It’s refreshing to find a company that combines excellent workmanship with genuinely good customer service. We wouldn’t hesitate to use Cleaning Doctor again and would thoroughly recommend them.

Five stars from us.

David & Helen, Comber
  
 
     Posted on Google  
   
   Jack Weir 
 17 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. I can totally recommend this Company for gutter cleaning after some work they carried out for me .
The owner James was excellent in every way and deserves 6 stars if that was possible!  His friendly approach, excellent work and reasonable charge are so appreciated in this cynical age.
Many thanks James
  
 
     Posted on Google  
   
   Chris W 
 15 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. Got my gutters, fascia’s and soffits cleaned… looks like new PVC was put on. Also got some insight into the conditions of my gutters and downpipes. Very quick too. Highly recommend
  
 
     Posted on Google  
   
   Gary Gardiner 
 11 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service. Would highly recommend.
  
 
     Posted on Google  
   
   Michele Boal 
 4 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. Just had our driveway power washed. Brilliant job, guys were thorough, cleaned up afterwards, a professional job. Pleased with the work that was completed
  
 
     Posted on Google  
   
   Robert Gamble 
 26 July 2026
 
 
 Trustindex verifies that the original source of the review is Google. James and his team claimed to take pride in their work and they really meant it. They were thorough and meticulous and wholly transformed the look of the surround of the house. Very highly recommended.
Robert Gamble
  
 
 
  
 
   Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

Award-Winning Service

See the results...

Real examples of our moss and algae removal expertise.

Our Process

The Softwash Solution

We treat the infection, not just the symptom.

1. Biocide Application

We apply a specialist biocide to the affected area. This is not just a cleaner; it's a treatment that penetrates the surface to kill the root system of moss, algae, and lichen.

Deep Penetration: Reaches the roots

Sterilisation: Kills invisible spores

2. Natural Cleansing

Once treated, the dead organic matter will weather away naturally over time with wind and rain. The surface actively resists new growth for months or even years.

Long-Term: Results improve over time

Maintenance: Fewer cleans needed

Black Spot

Removes stubborn lichen.

Red Algae

Treats unsightly wall stains.

My professional accreditations

Why Remove Moss & Algae?

The benefits of our professional biological treatments.

Prevents Damage

Moss holds water against surfaces, which can freeze and cause cracks in roof tiles, brickwork, and render.

Long Lasting Results

Our biocide treatments kill spores at the microscopic level, keeping surfaces cleaner for far longer than pressure washing alone.

Safe Soft Washing

We use low-pressure application methods that are safe for delicate surfaces like K-Rend, older roofs, and heritage stone.

Red Algae Removal

We effectively treat and remove the stubborn red streaks (Trentepohlia) often found on light-coloured walls.

Improves Safety

Algae on paths and decking is incredibly slippery. Our treatment removes this hazard, making your garden safe.

Stops Regrowth

The residual effect of our biocides continues to work after application, preventing new spores from germinating for months.

Price Promise

The price quoted includes all labour, equipment, and biocide solutions – no hidden extras. A home in Comber gets the same fixed, upfront quote as anywhere else we cover.

Fully Insured

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

Before & After

See the dramatic difference our moss and algae treatment makes. Click to zoom.

BEFORE

TREATED

Roof Moss Treatment

BEFORE

CLEAN

Driveway Moss Removal

BEFORE

RESTORED

Algae Treatment

Frequently Asked Questions

Common questions about our moss and algae treatments.

Why does moss come back after pressure washing?

Pressure washing only removes the visible growth. The spores and roots remain deep in the porous surface and quickly regrow. Our biocide treatment kills the root system, ensuring a much longer-lasting clean.

Is the treatment safe for my pets?

Yes, once the treated surface is dry, it is completely safe for pets and children. We take precautions during application to keep everyone safe.

How long does the treatment take to work?

You will see immediate results as we clean the surface, but the biocide continues to work for weeks, lightening the surface and preventing regrowth. The "self-cleaning" effect on roofs can continue for months.

Will it damage my roof tiles?

No. We use a "Soft Wash" method which relies on the cleaning product rather than high pressure. This is the recommended method for cleaning roofs as it avoids damaging the delicate surface of the tiles.

How often should I get this done?

Every surface is different and requires varying levels of maintenance with location, vegetation and climate all being a contributing factor to rate of regrowth. Ask our specially trained applicators for tailored advice relating to your specific needs.

Let's Chat

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

07917 275915

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James Roberts

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James Roberts

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Trusted by Bangor Locals Professional Moss & Red Algae Removal in Bangor