Thermally Efficient
Double Glazing Eastleigh

If you're looking to make the most out of your Eastleigh home, double glazing is the perfect option for you. With the cost of living ever on the rise, it's more important than ever to think about thermal efficiency. Double glazed windows and doors will help to ensure your home stays a more consistent temperature throughout the year. Whether it's the height of summer or the depths of winter, you'll have a cosy home space.

However, there are plenty more benefits of a more thermally efficient home. With energy efficient double glazing installed into your home, and less heat escaping, you could see less of a reliance on your central heating. In winter, this could be a lifesaver, helping to keep energy bills in a more manageable range. Make your home more cost effective with double glazed windows and doors.

Why Choose Britannia?

30 Years’ Experience

When entrusting your Eastleigh or further afield home to installers, you want to be sure they're experienced. Thankfully, with Britannia, this is the case. Our business has more than 30 years’ experience when it comes to double glazing. This means you can trust us to deliver.

The Perfect Fit

Unlike other home improvements companies, we don’t believe in mass production. Instead, we manufacture our double glazing bespoke to fit your Eastleigh home. The result? You can tailor your windows and doors to perfectly suit your unique style. Get the perfect fit with Britannia.

Huge Range

You’ll never be stuck for choice with our range of home improvements. We offer a huge selection of styles and products in each of our main categories. As a result, you’ll be able to find something that works with your home. Explore our full range of windows, doors and conservatories today!

Finance Available

Choosing the right double glazing can be a big commitment for your property. To help make this easier for you, we offer a range of finance options that can make this easier for you. Spread the cost of payment over a timeframe that suits you and your personal situation.

Colours & Styles

While performance is often the first thing people associate with double glazing, style is just as important. After all, every Eastleigh home will have a unique and distinct aesthetic. We offer a massive range of colours and styles to choose from, allowing you to create the perfect look.


We have full confidence that our double glazing installations will achieve a standard of quality. In fact, we’re so sure of this that we include a 10 year guarantee with each of our fittings. With this in place, you can have peace of mind that your home improvements will provide at least a decade of quality.

Double Glazed Windows Eastleigh

Double Glazed Windows Eastleigh

An integral part of any home, we offer a large range of double glazed windows to suit virtually any Eastleigh home. If you’re looking for double glazing to match a more traditional style, our bow and bay windows or sliding sash windows could be the perfect fit.

Alternatively, if you’re looking to inject modern design into your home, aluminium windows could be exactly what you need! Regardless of which style you choose, you can expect a high degree of quality from our double glazing. Made from the very best materials, weatherproofing, thermal efficiency and security will be at the forefront of our designs. Bad weather, intruders and the cold will all be kept at bay in equal measure when you choose our windows.

Double Glazed Windows Quotes Eastleigh

Double Glazed Doors Eastleigh

The first thing guests will see when visiting your home, your front door will make a big impression. This being the case, it’s key to have a door that suits your unique style and character. With a huge range of designs to choose from here at Britannia, you’ll be able to find the perfect double glazing solution.

Performance goes hand in hand with our range of double glazed doors. Energy efficient as standard, they could help to combat rising energy costs for your Eastleigh home. Made with modern uPVC, composite materials or aluminium, you’ll be able to forget about spending loads of free time on maintenance. Instead, our double glazing will give you a hassle free, stress free home improvement.

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Double Glazed Windows Costs Eastleigh

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Double Glazed Doors Eastleigh

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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.