High Quality
Heritage Windows

How long have you wanted to change your rattly, draughty windows for new, insulative ones but live in a conservation area? We are the local specialists in slimline aluminium windows and doors, replacement of steel windows (including Crittal® windows) and aluminium windows in a variety of colours and textured finishes.

We have a wide range of heritage windows, so you can choose the right one to fit in with the aesthetic of your home. Vertical sliding sash windows are available in uPVC, but with any finish you like. Our woodgrain finishes are virtually indistinguishable from real wood, but without the maintenance!

Why Choose Britannia?

Tailor Made

By manufacturing our heritage windows to your exact specification, we can ensure the best fit for your home. This is in terms of both style and performance. Made in our factory in Clevedon, we quality control every part of the manufacturing process to provide the very best double glazing.

10 Year Guarantee

When you choose uPVC and aluminium windows, you're choosing longevity. This is a major advantage of our heritage windows over the more traditional styles. With our 10 year guarantee included as standard, you're ensured at least a decade without hassle.

Double Glazed

All of the windows made in our Clevedon factory come double glazed as a standard. This ensures a baseline level of thermal efficiency that is sure to provide great performance for your home. We also have triple glazing options available for those looking for the best energy efficiency.

Expert Fitting

Fitting is one of the most important aspects of your journey with us. Particularly with heritage window installations, care and respect are of the utmost of importance. Our expertly trained team will deliver a smooth and professional fitting with a service that you can rely on.

40 Years’ Experience

Britannia Windows knows a thing or two when it comes to double glazing. Having been established for more than 40 years, our business has a wealth of experience that sets us apart from the competition. When you choose us for your heritage windows, you’re in safe hands.

Certass Approved

We have the backing of several major accreditations for our uPVC and aluminium windows as well as our service. Amongst these is our Certass accreditation. This approval is just another sign of our dedication to quality and excellence. We'll never compromise on quality for our heritage windows.

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Steel Replacement Heritage Windows

We have a range of steel replacement heritage windows that could transform your property. Modern slimline aluminium is a great replacement for these windows, granting many performance enhancements while retaining the original aesthetic. We can help you get windows you love that are in line with conservation area restrictions or approved for listed buildings.

As a result of upgrading to our heritage windows, you’ll see the benefits of modern technology combined with traditional style. Many existing windows will be made of antiquated materials, which are heavily impacted by weathering and age. Modern aluminium, on the other hand, is resistant to this wear. As a result, you can have much harder wearing windows while capturing the original style.

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Thermally Efficient Replacement Windows

Another reason why many are looking to upgrade to heritage windows is for increased thermal performance. If you are finding your current windows are draughty and poorly insulated, heating costs could be mounting. This being the case, by changing to our aluminium windows, you could help keep costs to a minimum. Help battle rising costs with our superior double glazed windows.

All of the windows we supply and install are made in house from our Clevedon based factory. Working on a made to measure process, we’ll ensure our windows are the perfect fit for your property style. We can customise the colours and hardware of our windows to make sure we achieve the perfect vision you have in mind.

Frequently Asked Questions

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Tim Greenslade
Tim Greenslade
Every person was polite and professional, helpful and personable. The process was simple and clearly explained each step of the way. It is rare to get such good service, not to mention the quality of the products. I am very pleased with the windows, the fitting, the price and the experience as a whole. I would happily recommend Britannia Windows.
From the salesman to the office staff and fitters, everyone was thoroughly pleasant and helpful so an excellent experience all around. I'm very pleased with the windows too, they look great. Would recommend without hesitation.
Meg Welch
Meg Welch
Great job of our new front door. They couldn’t have been more helpful and even fitted earlier originally planned. Also gave great aftercare advice and at a very reasonable price! Would 100% recommend.