Double glazed windows

Find the price of your new windows by entering your measurements. All available with double or triple glazing - see the selection below. Order directly online.

Why order from Klar?

Your new windows and doors should be made uniquely for your home. Here's four good reasons why you should choose Klar for that job:

All the windows and doors are produced in our own factory
We replant trees for the ones used
We're here to help you by phone or email at most hours
You get up to 12 years warranty
It Is Easy to Order Windows & Doors Online

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Receive your delivery and install it:

Read our guide on installing

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When it comes to windows, the adage that ‘two is better than one’ definitely holds true. Gone are the days of single-glazed panes for the thermal efficiency and energy savings that double-glazed windows provide, which have been in use since the 1950s in the USA and caught on a couple decades later in the UK. Due to their energy savings over single-glazed windows, windows with double-glazing came into the spotlight towards the millennium since their thermal efficiency supported the regulations in the 1997 Kyoto Protocol. 

In 2002, UK Building regulations made double-glazed windows the minimum standard for new buildings. Thanks to their popularity and robust performance, there are now a wide variety of double-glazed window styles to choose from. At Klar, we are happy when our customers are satisfied. Understanding just how important it is for you to personalize your home with the right touches, we provide a wide variety of double-glazed windows styles – all with customisable features. Feel free to take a closer look at our guide, An Overview of Styles of Double-Glazed Windows.

What are double-glazed windows?

So, what exactly is double-glazing? Well, it is just like it sounds – windows with double-glazing have two panes of glass. The two panes are sealed into a framing structure with a gap between them in a ‘sandwich-like’ construction. This space is filled with an inert gas like argon, xenon or krypton that provides extra insulation and helps to maintain the internal climate of your home. 

Since these inert gases do not conduct heat as well as air does, the transfer of heat from inside your home to the outside is prevented. In this way, the inert gas acts as a buffer that provides an excellent protection from having the heat escape through the windows. Check out our blog if you are curious to read more about What are Double-Glazed Windows?

What are the best double-glazed windows for my home?

If you are looking to purchase new double-glazed windows, chances are that you are searching for the very best options for your specific needs and preferences. The best double-glazed windows are ones that are made with high-quality materials, like the FSC-certified knotfree pinewood that Klar uses to construct all of their premium windows or the alternative alu-clad frames with a powder-coated aluminium finish. The rest is completely up to you – as far as style and choosing among all of the many customisable specifications that Klar windows feature. 

How much do windows cost?

You might be thinking that if double-glazed windows provide considerably better energy efficiency than single-glazed windows and help to save so much on energy bills, then they must be a significant investment – and especially if they are made with premium materials. If so, you’re definitely not alone. The truth of the matter, however, may come as quite the pleasant surprise since these days, even the best double-glazed windows don’t have to break the bank. 

The cost of new double-glazed windows depends upon various factors, including window style, size, frame materials, level of glazing and other customisable features such as glass types. To give a general price range, on average, the most inexpensive pinewood windows with double-glazing start at only 66 GBP for fixed windows, to a middle-range price of top-guided windows at 172 GBP, to Georgian windows at 332 GBP. Klar’s user-friendly platform makes it a cinch to see the cost of different window styles and customisable specifications. To get the full scoop, take a look at our blog, What do New Windows Cost These Days?

How to replace double glazed windows

If you need to get replacement windows for your home, you might be wondering how much it will cost to hire a professional to get the job done. Klar offers an affordable DIY option where there’s no need to pay extra fees for help with the installation. We have created a comprehensive, step-by-step guide to window installation that outlines simple and clear instructions for beginners and pros alike. 

The first thing you need to do when looking to replace double-glazed windows is to measure the size you need, which is probably quite a bit easier than you might have thought. The next step is to select which kind of windows you want to replace the old ones with – with the wide variety of styles and customisable features, this step may even be the most difficult. Just click and order, and when your replacement windows arrive, you can uninstall your old windows by following our video guides and contacting our support desk should you need any help along the way. Once the old windows are out, you can install the new ones and then as the last step, give yourself a pat on the back and admire your DIY handiwork.