Welcome To C-Thru

Window Cleaning Specialists in Belfast

We provide a wide range of cleaning services suitable for all commercial premises, as well as domestic. We have 10 years’ experience so you can trust you and your premises are in safe hands.

C-Thru Cleaning Specialists in Belfast Fav

Professional Window Cleaning in Belfast

Our Services


Commercial Window Cleaning

Effective window cleaning requires skill, experience, and expertise. At C-Thru Cleaning, we are fully equipped and can clean all types of windows


Domestic Window Cleaning

You don’t have to search too hard to find reliable window cleaners. We are conveniently located in Belfast and serve clients in the surrounding areas. 


Gutter & PVC Cleaning Services

An important but often overlooked part of your property maintenance is keeping your gutters free of debris to allow water to drain from your roof properly. 

About Us

a family-run business

We are always prompt and friendly – we work hard to ensure our customers are satisfied with our service. C-Thru Window Cleaning Specialists have built a reputation for excellent cleaning, and we always do our best to uphold this reputation. We are a family-run business that’s committed to providing a friendly, affordable, professional, and reliable service to all our customers.

If you are unsure of your current requirements, call us and we will be more than happy to provide you with any information or advice.

C-Thru Commercial Window Cleaning in Belfast
C-Thru Domestic Roof Cleaning in Belfast
C-Thru Commercial Gym WIndow Cleaning in Belfast
C-Thru Domestic Gutter Cleaning in Belfast

What We Offer

high-quality Cleaning

We are fully qualified and insured for your protection and satisfaction. Our client base has slowly grown over the years, which is down to the hard work and commitment of both us and you, our clients. We have the necessary equipment and experience to work well cleaning your commercial premises. We provide a range of high-quality cleaning services to Belfast and Northern Ireland. Both domestic and commercial customers are catered for.

For further information about our window cleaning services, please do not hesitate to get in touch. We’re based in Belfast and happy to help.


Customer Satisfaction

See what our customers have to say about our services, or leave a review yourself using one of the links below


Ji Developments ltd


Excellent service. came out to us as we were close to finishing a property refurbishment, unfortunately we were not quite ready for the windows doing this was our fault completely. Not a problem For Chris without hesitation he arrange to call out the following morning and he and his colleague did an excellent job cleaning the windows and frames. I’d highly recommend.


Katrina Morgan


C-thru is a great window cleaning service I’ve been using them for over a year as I heard great reports prior on them and they’ve been doing my windows and other cleaning services since and I highly recommend them.

All the boys are lovely and would help me with anything.

The value for the amount of work and the effort that goes is unbeatable and the business is well known and respected I wouldn’t use anyone else


Chris Kelly


The lads just came out to Holywood to do the windows and PVC and they look superb at a great price. Very quick too. Will definitely be using them in the future and recommending them


Robbie Fowler


Job well done everytime
Good men


Steve Cox


Chris came out to clean my Solar panels and they look like new. Brilliant job, have already recommended to a friend .


Rowan Gibney


I got a very quick response when I asked for a quote for window cleaning. Windows were cleaned the following day for a good price. Will be using again.


Will Hanna


Very quick & professional service. Great customer care & communication too. Easy to deal with and happy with the results. Would def recommend


Harriet Julian


Excellent service from Chris and his team. Efficient and very reasonable. Thank you. Definitely recommended!


Scott Lewis


Great service, top job, nice lads! Would definitely use again


Caitlin Campbell


Does a good job on your windows and quick at getting out to you as a first time customer