uPVC Window Replacement Glasgow - Double Glazing - Free Quote

Caledonia – Your Local, Professional Window Fitters

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First-Class Window Replacement in Glasgow

Are your windows old and outdated? Could you benefit from a set of new double glazed windows or even triple glazed windows at your home or business premises to improve insulation at your property?

Then you’ll want to speak to our team here at Caledonia Windows and Doors – the premier window supplier in Glasgow. We specialise in fitting new windows and replacing windows that have failed, cracked, broken or simply require an upgrade with a wonderful collection of uPVC windows to choose from.

Order Your New Windows Straight From Us – The Manufacturer!

Caledonia Windows & Doors have been manufacturing and installing high quality Rehau windows in Glasgow and the surrounding local areas since 2007. All of our energy-efficient windows are manufactured at our fully-equipped factory. This allows us to ensure that the highest standards are upheld at every stage in the manufacturing process. As we manufacturer our own window products, we can offer our customers the best prices for buying direct from us – why pay more by using a middle-man?

No matter whether you have a traditional or modern style in mind, we can design and fit any style or colour of windows and frames to suit your preference.

We pride ourselves on providing a variety of uPVC window styles for our customers to choose from. Our popular product range includes:

Reversible windows
Flush-fit windows
Tilt-and-turn windows
Velux windows

We’re known for fitting and replacing double glazing in Glasgow, but we also offer triple-glazing windows too, so you can benefit from the enhanced strength, and heat and sound insulation properties. We have options available to suit every budget or décor preference, and can fit for different window types, from bay windows to skylight windows. As we manufacturer, we can also cater to bespoke sized windows too!

Contact Caledonia – The Leading Window Company in Glasgow

Are you considering replacing the windows at your home or business? Contact our friendly team at Caledonia Windows and Doors today. We have every confidence that you won’t find a window company in Glasgow that beats us on service, build quality and value. To find out more about our products or to arrange a free quote, call us on 01236 888110.

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Trusted By Homeowners & Businesses

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      EXCELLENT  
   Based on 152 reviews 
    
 
 
 
   
 
 
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   adam clarkson 
 5 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. A really great experience from beginning to end from Graham coming out to measure no ridiculous 3 hour sales pitch he knew what we wanted as soon as we told him and he had a quote over to us the next day . The fitting team were superb respectful hard working and the communication was great at all stages . The quality of the doors and windows is first class I would highly recommend Caledonia to anyone who is looking for new windows and doors
  
 
      Posted on Google  
   
   Ciara Mc Gann 
 3 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. A great experience dealing with Caledonia windows & doors. From initial phone call, to Graham visiting to take measurements right up to the 2 lads fitting the doors everyone was great to deal with while being very professional. The whole process went very smoothly.
I was especially impressed with the customer service team - Gillian in particular could not have being anymore helpful!
We are so pleased with our doors and would highly recommend this company!
Thanks again,
Ciara Flynn
  
 
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   Juliet Hancock 
 1 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. A great service from start to finish, 4 windows and a tricky cat flap in the conservatory - everything went exactly as planned and Robert and the team were so friendly and helpful - always on time, tidied everything as they went along and made us feel very confident in the work they were doing.  Delighted with the end result and would recommend to everyone!
  
 
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   Anne Speirs 
 28 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. I am so happy with my new front door. The staff were excellent. Ellis who fitted my door was so happy and cheerful and so professional. If I was thinking of new windows etc I wouldn't go anywhere else. Dont think they would be beaten on price or workmanship.
  
 
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   Gus Gallacher 
 21 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Had a new front door fitted at elderly parents home as well as son's home included new French doors and kitchen window. The whole experience from start to finish was excellent the team who carried out the work are a credit to the business friendly and efficient.
  
 
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   Amy Wan 
 7 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Smooth process from quote to fitting the door! Amazing communication! Lovely fitters coming to fit the door! 100% recommend for anyone wants their windows and doors
  
 
      Posted on Google  
   
   Andrew Nesbitt 
 7 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. We are absolutely delighted with our new windows. The installation team, Alan, Stephen & Ross worked every day without a break, we are really impressed with their work ethic and attention to detail and so glad we chose Caledonia Windows. 5 star team from a 5 star company we highly recommend them to anyone looking for new upvc windows.
  
 
      Posted on Google  
   
   Jim Swan 
 7 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. From the first quote to the final installation everything went very smoothly the installation was very professionally done and I couldn't be happier with my new door.
  
 
      Posted on Google  
   
   Christina Mari Cuss 
 5 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Caledonia Windows & Doors installed my new composite Irish Oak door. The door and frame were of high quality, the installers made sure it fit perfectly. Installers worked very hard to do an excellent job including putting sheets down and cleaning all areas as they worked. The plastering had a few chips and they organised the plasterers to come out and fix chips within a couple of hours. Very impressed with works and also the customer service team. I would highly recommend this company for installing new doors, as love my new door & the service I received. ⭐⭐⭐⭐⭐
  
 
      Posted on Google  
   
   carol-Anne 
 4 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. I absolutely love my new front door from Caledonia Windows & Doors. I highly recommend this company; their staff truly are their main asset. The salesman Robert was excellent when he visited my home, taking the time to talk me through all of my options clearly.The fitter, Ellis, was also fantastic. He was polite, courteous, and friendly throughout the installation, cleaned up after himself perfectly, and was highly professional from start to finish. Both are a real credit to the team.

Choose From A Variety of Window Styles

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uPVC Windows

Double Glazed Windows

Triple Glazed Windows

Velux Windows

Tilt and Turn Windows

Reversible Windows

Flush Fit Windows

Modern uPVC Windows in Glasgow

Before committing to buying uPVC windows in Glasgow (or any glazing product), there are a number of factors that you should consider. These include build quality, the range available and, of course, the cost.

If you choose Caledonia Windows to replace your windows, you’ll have a great choice of quality, energy efficient, Rehau uPVC windows to select from, with a number of attractive frame, colour and finish options also available!

Take a moment to explore our latest range and we’re confident we’ll find something that suits your décor preferences at the right price.

Double Glazing in Glasgow

Better insulate your property and reduce the noise heard from outside by having double glazing installed. At Caledonia Windows and Doors, we offer a varied choice of high-quality Rehau double glazed windows in Glasgow with styles and designs to suit every preference.

Triple Glazing in Glasgow

If you’re searching for the very best insulation and thermal efficiency and are prepared to pay a little extra, we believe that our triple glazing windows fit the bill. These units have been purpose-built to minimise cold spots and external noise. And of course, our triple glazing units are available in a wide choice of stylish designs and eye-catching colours.

Velux Windows For Your Roof in Glasgow

Perfect for barn conversions, bungalows and attic room spaces, Velux windows allow light to enter your room from above. This window style is ideal for rooms in the home which may not have space for traditional windows in the walls, or rooms that require more light than is currently available through windows fitted to the the exterior walls.

Our team can fit Velux skylight roof windows in Glasgow for properties with a pitched roof. A survey by our team would be required to confirm suitability for Velux windows, from which we can provide a choice of top-hung, centre-pivot or sun tunnel windows.

Versatile Tilt and Turn Windows in Glasgow

Whether you’re looking to replace the windows at your home or business, consider having tilt and turn windows installed in Glasgow at your property. Tilt and turn windows are pretty versatile as they can open at an angle – or inwardly, which makes it easier to ensure your home is ventilated. They can also be securely locked for your peace of mind. Speak to a member of our team today to find out more about the advantages of tilt and turn windows in Glasgow.

Space-Saving Reversible Windows in Glasgow

Our reversible windows are modern, resilient and designed to make optimal use of the available space, making them the perfect option for high-rise apartment properties and office complexes. Not only that, our reversible windows are simple to use, available in a host of stylish designs and energy efficient too!

If you’ve limited space internally, then choose to have reversible windows installed in Glasgow at your property might be the best choice. The window rotates on its own axis, so doesn’t require the space other types of windows do, and allows plenty of airflow when opened. The mechanics of how the window opens also meakes it easier to clean the glass.

Discover Our Stylish Flush Fit Windows in Glasgow

We are proud to be among the growing number of window companies offering Rehau’s popular Rio Flush Fit windows in Glasgow. The window’s appeal is that the sash is flush with the outer frame when closed, giving a smooth, sleek and seamless appearance. All the windows in this range are durably constructed and feature a high-quality finish that will add value and character to your property.

Would you like to augment your home with a set of attractive flush fit windows? One call to the friendly team at Caledonia Windows & Door is all it takes.

Gallery

Some of our recent installations, all custom made in our own factory in Cumbernauld.

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Why Choose Caledonia For Your New Windows in Glasgow?

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Great Looks, Minimal Maintenance

All our window units are built to stand the test of time. With just a little periodic maintenance, your new windows from Caledonia Windows & Doors can look as good at the 10-year mark as on the day they were installed!

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A Varied Range of Styles and Designs

Every property is different, which is why we aim to bring you an extensive choice of high-quality Rehau windows in Glasgow. Whether you envisage a modern, traditional or rustic look, you’re sure to find exactly what you need in our latest range. We also have a number of energy efficient models available to help you save even more in the longer term.

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A Bespoke Service

At Caledonia Windows & Doors, we pride ourselves on offering a personal service that’s tailored to your individual requirements. We can provide you with a brand new set of windows to augment your living space. Our windows are made to measure at our local factory and installed by our own fully-trained installers to help ensure a perfect fit.

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Save Money By Buying Direct With Us

Save money by buying direct from the manufacturers – us! As we make all our own windows at our facility in Cumbernauld, we can give you the best prices so why use a middle-man?

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Keep Your Property Safe and Secure

Our windows incorporate modern security features such as multi-point locking systems, which help to keep your place secure and deter any would-be intruders.

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Fully Guaranteed

All our windows come with a 10-year guarantee. So, in the unlikely event that they become worn or damaged during this period, you won’t be left out of pocket.

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Hassle Free and Reliable

No matter what window style and configuration you ultimately opt for, our experienced window fitters in Glasgow will be on hand to ensure your experience is as stress-free as possible! Our fitters will arrive punctually at the arranged time to install your brand new windows. We will strive to keep any disruption to a minimum. So, if you’re considering a new set of windows, please don’t hesitate to give us a call.

Finance and Payment Options Available For Triple and Double Glazing in Glasgow

We offer a choice of flexible finance and payment options, so that you can cover the cost of your new double-glazed or triple-glazed windows without overstretching your finances. Call our helpful team today for more details! You can contact our team directly on 01236 884913. Alternatively, fill out our simple online contact form and we will get back to you as soon as possible.

Our experts have reliably manufactured and installed exceptional windows in Bishopbriggs, windows in Stepps – and windows in Kirkintilloch. No matter what you have in mind for your place, you can count on our team to provide you with a stylish set of new windows that you’ll be proud of. Our work has garnered many five-star reviews from many happy customers. So, you can have every confidence in the work we do. Why not give us a call today?

Other areas we cover include:

Windows Bearsden

Windows Chryston

Windows East Kilbride

Windows Newton Mearns

Windows Lennoxtown