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NII Clean HQ

Specialists in Exterior and High Level Cleaning Across Northern Ireland

Trust the experienced team at NII Clean. We are one of Ireland's leading cleaning companies that specialises in roof cleaning, gutter cleaning, soft washing, pressure washing and more.

A trusted team, we clean and treat the outside envelope of any building

At NII Clean Ltd, we do more than just clean. We believe in providing a thorough and comprehensive service that will not only leave your property looking great, but also help to protect it from the elements going forward. We are highly skilled specialists who use our wealth of knowledge to provide the right cleaning service, the right advice and always at the right price! Our services include roof cleaning, soft washing, pressure washing, window cleaning and high level cleaning. Alongside our cleaning services, we also provide products to the industry including pressure washers, window cleaning supplies, chemicals & accessories. We have a high profile workshop and trade counter in Coleraine and we cover all of Ireland. Contact us for more information or to get a free quote now.


High level cleaning for domestic and commercial properties

Make sure your property looks fantastic and is protected from the elements with help from NII Clean. When it comes to our specialist cleaning services, we create tailored packages designed to suit your building and your budget. We offer advice about which type of cleaning would be best for the dirty area and we can combine different cleaning techniques to ensure you get the best overall results.

Moss on rooftop
Clean rooftop
Dirty commercial building exterior
Clean commercial building exterior
Dirty exterior wall
Clean exterior wall

Dirty UPVC guttering
Clean UPVC guttering
Dirty windows on french doors
Clean windows on French doors
Dirty steps leading to a house
Cleaned steps to house
NII Clean headquarters
  • Q. How Do You Clean the Roof?
    A. We use ladders, an aluminium scaffold tower or our own truck mount cherrypicker to go to gutter level. We then use relevant tools and telescopic poles with scraping profiles on the end to scrape 95% of the moss off the tiles. Finally a chemical is then applied onto the tiles to treat and clean the roof over the coming weeks and months.
  • Q. How Long Will The Roof Stay Clean?
    A. We give a 12 month regrowth guarantee. This means if there is any regrowth on the roof within 12 months of cleaning, we will retreat your roof for free. Normally a roof should stay clean from anywhere between 3 to 5 years.
  • Q. What Chemicals Do You Use?
    A. We use a range of chemicals, most of which would not be over the counter products. We have extensive experience in using all of the products we use to ensure we do not damage your property in anyway.
  • Q. What Guarantee Do You Give?
    A. We give all our customers a 12 month regrowth guarantee. Should any moss regrow on your roof within the first 12 months we will retreat free of charge.
  • Q. Why Not Use A Different Company?
    A. We have extensive experience in roof cleaning and soft washing and because of this our operatives are trained to a very high standard. We have a fully functioning head office which ensures we can handle your enquiry, process your jobsheet and carry out your cleaning work to our exacting standards. We are fully insured and comply with all current health and safety directives and COSHH regulations for the use of chemicals.

A big thank you to Mark and his team for an excellent job clearing out our gutters, then cleaning them along with the down pipes.

They then cleaned all the soffits and PVC and finished with the windows. You have no idea how dirty the outside is until these guys get to work. Mark and his team are very polite and explain everything that they are going to do, and just get on with it. I would highly recommend their services, including the regular window cleaning.

Debbie Brackstone

Facebook Review


The NII Clean showroom is located on Bushmills Road in Coleraine. We welcome local customers that are both private or in the cleaning trade themselves and we also supply online to customers throughout Ireland. We are stockists for PdPro. Streamline Systems & CBD pressure Washers, take a look at some of our featured stock below.

Contact the exterior cleaning specialist at NII Clean

We are one of Ireland's premier cleaning companies and are on hand to offer information, advice and free quotes. Why wait? Get in touch today to find out just how great your property can look with the right cleaning service.

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