Disclosure: FMB Home Picks is committed to delivering independent advice and reviews on home products and services. When you purchase through links on our site, we may earn an affiliate commission.Learn moreContact us.
We examine Britannia double glazing windows to find out whether this company deserves to rank among the top window installers in the UK.
Britannia Windows is a family-owned business based in Clevedon, near Bristol, which specialises in double glazing windows. The company manufactures its own window units to size, using glass that has at least an A+ rating for energy efficiency. While the factory and headquarters are based in Clevedon, Britannia has showrooms across Bristol, West Sussex, Somerset and Hampshire.
The company offers uPVC and aluminium windows only, and customers can choose from an impressive colour palette including white and two woodgrain effect options – cherrywood and golden oak. Britannia’s premium range includes fine woodgrain finishes that resemble real timber frames very accurately. Options include woodgrain white, cream, rustic cherry, Irish oak, red, blue, Chartwell green, and grey.
Despite its growth and success in the South of England, Britannia has retained the hands-on approach of a friendly family business, offering advice and consultative home visits to draw up accurate quotations.
Britannia also offers low-cost monthly financing, “buy now, pay later” plans and a 0% APR on purchases over £3,000.
On the downside, we’ve seen several poor reviews about Britannia Windows on Bark, Trustpilot, AllChecked and Yell. It seems that customers’ experiences can vary significantly depending on the contractor, as is often the case with double glazing window companies. However, compared to other window providers, Britannia has relatively few reviews, so bear this in mind when you make a decision.
Britannia offers uPVC and aluminium double glazing windows in a range of styles, including casement, heritage and tilt and turn. You can select from a range of colours, including different realistic woodgrain finishes. The replacement window range is also available in triple glazing, and the company only installs windows with a minimum A+ rating for optimum noise insulation and energy efficiency.
Choosing a company can be a difficult decision as the windows you choose can affect your home’s comfort and energy efficiency. Plus, installing replacement windows is an expensive process, so you want to ensure you get it right. Always consider the pros and cons before making a final decision.
After your enquiry, a Britannia consultant will visit your home and discuss the various options available before preparing an no-obligation windows quote. This step in the process is free of charge, allowing you get to grips with the company’s products and prices before parting with any money.
Britannia also has an online tool where customers can experiment to their heart’s content with colours and styles to visualise the end result.
Once you approve a quote, installation should happen within 8-10 weeks.
Britannia Windows is an affordable option for buyers seeking flexible finance, high-quality products and a vast customisable choice. However, the company only operates in the south west regions of England, so if you live further north, you will need to consider alternatives.
If Britannia doesn’t operate where you live, you could also consider Anglian, our top choice for the best window installer in the UK. Anglian offers SBD-accredited double and triple glazing windows with uPVC, aluminium or timber frames.
Britelite is a good alternative and offers competitive pricing. Like Britannia, this company offers different colours as well as triple glazing and a 10-year transferable guarantee. Britelite operates in Kent, Sussex, Essex, Surrey and London, so it may suit customers in different areas who are outside of Britannia’s catchment area.
Providing an exact estimation of what you could expect to pay for your new double glazing windows from Britannia is difficult. The cost will ultimately depend on the window style and finish you select and how large your windows are. However, online comparison sites can give you an estimation of what you might pay:
| Material | Cost (excluding installation) |
|---|---|
| uPVC | £300 – £600 per window |
| Aluminium | £550 – £750 per window |
Britannia says its windows are very low maintenance. If you’ve opted for aluminium frames, you can rest assured that they are rust-proof. You simply wipe down the frames and vacuum away any debris and dust to extend their lifespan.
uPVC windows should be wiped down twice a year with soapy water and dried with a soft cloth. Glass must be cleaned with clear liquid glass cleaner and not with paste or cream cleaners.
As of August 2025, Britannia has a 4.2-star rating on Trustpilot, ranking it as a “Great” company. As mentioned above, it only has just over 400 reviews, so take this rating with a pinch of salt. The positive reviews praise the quality of the service received and the ease of organising a window installation through the company, while negative reviews highlight issues with installations and lack of customer care. It seems the service varies according to the contractor used, but again, there aren’t really enough reviews to inform that hypothesis.
“I have had several patio doors, windows and composite doors over a period of several years. All were competitively priced but most importantly were installed to an excellent standard hence my repeated purchases from this company.”
“Each person I spoke to at Britannia windows was professional. The installation itself was done to a very high standard and the site was left so clean. The windows themselves are great quality. Very pleased with each part of the process. Will be using again when needed. Thank you.”
“Paid a premium to have triple glazed French doors fitted in March 2025. I was surprised on fitting to see a 1 cm gap at the bottom of the doors filled with a strip of plastic called a gasket as this cant have the same thermo- efficiency as triple glazing. Unfortunately this has shredded and needed to be replaced and the doors adjusted to stop this happening. To date a total of four fitters( including the original fitter ) have adjusted the doors and each has told me the previous fitter had not adjusted the doors properly ( a training issue?) Another fault was a ‘clunky’ action door handle hopefully now fixed. A fault we did not report was rusting screws fixing a hook and eye we replaced them ourselves with stainless steel screws (poor attention to detail).
Trying to contact Britannia re these faults was a nightmare phones are not manned a recorded message states your call will be returned, never was despite many messages left. Same goes for complaints form on web site. In desperation we visited the showroom twice. very poor customer service.”
Britannia offers a variety of design and colour options, enabling homeowners to find the style they are looking for. Online design tools, home visits and a number of convenient and beautifully laid-out showrooms make it easy for homeowners to visualise and choose their window products.
The company only offers aluminium and uPVC replacement windows, but its premium uPVC woodgrain finishes are particularly appealing, as the fine details can offer the attractive look of timber, without the cost.
The windows are highly energy-efficient, and triple glazing is on offer as well if you would like extra insulation.
Britannia is a good option for homeowners in the South West of England who require flexible financing. The company’s products are wide-ranging and high-quality, yet cheaper than companies like Everest.
There are many factors that affect the total cost of double glazing windows, including the company you choose to do the installation, the style of window, the frame material, the colour and finish and the size of your windows. However, as a general estimate, you can expect to pay anywhere from £520 to £650 or more for a standard casement uPVC window.
Adding an additional layer of glass to an existing window is known as secondary glazing. A thin frame is installed on the interior of your current window, allowing for a gap between the old pane and the new. Although secondary glazing does offer insulating properties, generally it isn’t considered to be as effective as double glazing at keeping your home warm.
The lifespan of double glazing windows depends on the material they’re made of and how well they’re looked after. uPVC windows tend to last around 20-25 years, aluminium around 45 years and timber up to 50 years or more, according to Everest.
The advantages of double glazing windows far outweigh the disadvantages; however, there are a couple of points to consider:
Many double glazing providers are offering triple glazed window units, and they are becoming increasingly popular with homeowners. Consisting of three panes of glass with air, or gas filled spacers between them, the insulating and soundproofing properties that double glazing offers, generally improve with three layers of glass – in some cases, by as much as 50%. However, this should be balanced against the increased cost of triple glazed windows.
To put together this Britannia Windows review, we read hundreds of customer reviews, professional opinion pieces, forums and technical documentation to understand what the company offers homeowners.
We then rated Britannia based on the features and qualities customers care about most, including:
Read more about how we review windows.
