"The Doff steam cleaner is the only machine English Heritage approve for use on its buildings and for good reason" 

Doff steam cleaning is probably the safest way to clean any substrate without causing damage to the surface being cleaned. 

DOFF is a steam based stone cleaning system. It’s unlike any other steam system and can achieve temperatures of up to 150°C at the nozzle end – making it a ‘superheated water system’. The operator is able to vary the temperature and pressure to carefully remove many different types of paint and biological matter. It is used for the gentle removal of Flexible Paints, Graffiti, Algae, Moss, lichen and much more. 

Doff Steam Cleaning should only be undertaken by experienced exterior building cleaning companies who understand safe working practices.

Different types of stone require different levels of expertise and our operatives are trained and experienced in both hard and soft stone cleaning techniques.

Our operatives understand the difference when cleaning Granite or Sand Stone. 

Whether you have a commercial or private property, KornerStone's trained operatives are well-equipped to clean it safely for you.


"Prevent expensive damage to the structure of your home  Regular gutter cleaning to clear all debris and blockages; prevents roof leaks, interior dampness and roof line rot"

At KornerStone we offer CCTV gutter cleaning performed from the floor. As this method is safe, you don’t have to worry about any potential health and safety hazards.

  • Inside and out guttering services
  • Fascia cleaning
  • Soffit cleaning
  • Cladding cleaning and more

You can count on us for domestic, commercial and industrial gutter cleaning services.


"The exterior of many high street retailers, supermarkets, car showrooms, industrial and office buildings are characterised by aluminium or steel cladding panels"

This cladding along with crucial business signage becomes dirty and tired-looking over time, without a good clean and maintenance schedule. This doesn't create a good impression of the business to your visitors or clients.

If left untreated, these panels can even become permanently discoloured through the build-up of dirt and algae, or even corroded, leading to expensive remedial work. A well preserved and clean surface keeps any premises looking fresh and inviting. 

From caravan parks to hotels, industrial units to distilleries, we customise our commercial cleaning services to suit your needs.​

With over 7 years’ experience in this field, we have built a solid reputation for offering excellent quality cleaning services across North Wales, Chester and the Wirral.

At KornerStone we utilise our expertise and passion for cleaning to ensure only the highest standards. 

"Contact us today with your cleaning requirements; we will advise you on our most cost effective solution"


"When moss, algae and lichen are left untreated, they can look unsightly and can damage some types of roof tiles. They also contribute to blocking roof gutters creating you further ongoing maintenance problems" 

KornerStone's professional commercial and residential roof cleaners are able to carry out any roof cleaning projects. 

With the flexibility to adapt to any roof type, we are fully equipped to offer the highest quality moss, algae and lichen removal and to apply biocide treatments. 

We specialise in commercial roof cleaning including warehouses, industrial units, residential homes, hotels and offices and most other commercial properties and will provide a Risk Assessment and Method Statement.

Extend the life of your roof with a regular roof and gutter inspection. Regular gutter cleaning and roof biocide treatments are among the most important services KornerStone provide.  

Server IP: