Triple-glazed windows and doors

Save energy – and cash – with our range of affordable triple-glazed doors and windows.

Triple glazing supplied and fitted in West Yorkshire

Why choose Calder Windows?


Expect total peace of mind from the moment you make the call.

We're experienced

Experience matters – and we've been supplying windows in West Yorkshire for more than 30 years.

We care

You'll never face cold calls or hard sells. Expect fair, friendly service and excellent aftercare.

We guarantee it

We only work with suppliers we trust. That's why we offer a 10-year guarantee on all installations.

The UK's best triple-glazing system?

With revolutionary thermal shielding and an A++ energy certification, it just might be…

Do you want a warmer home and a healthier bank balance? Are you concerned about your environmental impact?


Our revolutionary triple-glazing system might be the answer you've been looking for.


Choose Calder triple glazing and you could improve the thermal efficiency of your windows by a whopping 40%. That would mean huge savings on your energy bills – and a big step forward for your carbon footprint.


It's all thanks to its robust, secure design and extra-thick thermal shielding. Most triple-glazed windows use 28mm-thick units – the same as double glazing. But ours are built with 40mm units to trap heat more effectively and help you beat rising energy costs.*


Best of all, they don't cost the Earth. Like all Calder products, our triple-glazed doors and windows offer exceptional quality at a very reasonable price.

A++ certified

Our extra-thick triple-glazed windows are certified to the highest possible BFRC energy grade.

Peace of mind

Take control of rising energy costs. Our triple glazing boosts thermal efficiency by up to 40%.

Extra secure

As well as warming your home, our triple glazing makes it more difficult for intruders to break in.

Calder's 40mm-thick triple-glazing system is available on all uPVC windows in The Definitive Collection. For more details, get in touch.

Choose a triple-glazing style

Triple-glazed uPVC windows


Triple glazing is available across our range of uPVC windows. Pick from triple-glazed sash windows, casement windows, tilt-and-turn windows and more.

Triple-glazed aluminium windows

Enjoy the strength and sleek appearance of aluminium windows, complete with a unique triple glazing system for enhanced thermal efficiency.

Triple-glazed doors

Add a stylish touch to your composite door, while cutting down on noise and heat loss. Many of our decorative glass options are available as triple glazing.

Triple-glazed windows vs double-glazed

Is it worth the upgrade? Here are the facts.


Double and triple glazing are both designed to reduce heat loss, dampen traffic noise and improve home security.


So what's the difference? Simple. Triple-glazed windows do everything that double-glazed windows do – they just do it better.


Take thermal efficiency, for instance. Our double-glazing units achieve a BFRC energy rating of A or A+, while our triple-glazed windows are rated A++. This is the best possible rating on the BFRC scale.


Triple glazing trumps double glazing in other ways too.  Our triple-glazed units perform better in terms of noise reduction, condensation reduction and security.


Should you choose double- or triple-glazed windows? That depends on your personal needs and circumstances. But if you're trying to save on energy bills and cut your carbon footprint, triple glazing could prove to be a very worthwhile investment.

Talk to an expert

Choose our triple glazing to enjoy all the benefits of our standard range – and more besides.

  • Tough as nails: our windows and doors are built to last for years. (And built for British weather, too.)
  • Top-notch security: expect peace of mind as standard, with features like Yale door locks and multi-point window locks.
  • Customisable: choose from a broad range of colours, styles and decorative glass panels.
  • Quality guaranteed: most products come with a 10-year insurance-backed guarantee.

Get a FREE quote

Go for peace of mind. Choose one of the best triple glazing systems in the UK – installed by the most trusted supplier in West Yorkshire.


Ask for a free quote today or spread the cost with our 0% finance offer.

Request a quote

Frequently asked questions

  • What is triple glazing and how does it work?

    Triple glazing is a relatively new innovation in sustainable window technology. It's a big step up from double glazing in terms of thermal efficiency, soundproofing and condensation reduction.


    How does it work? The clue's in the name. Like double glazing, triple glazing incorporates several layers of glass to help trap heat indoors. While double glazing has two panes, triple glazing uses three.


    In modern windows, the gaps between the panes are filled with an inert gas. Because these gases are excellent insulators, they help to keep your home extra cosy.


  • Is triple glazing worth it?

    Yes – if you choose Calder. Our triple-glazed doors and windows are specially designed with extra-thick (40-millimetre) units, which improves energy efficiency by up to 40%.


    This is especially beneficial in our current climate. At a time when environmental concerns and energy bills are increasing, it makes sense to choose an option that helps address both.


  • Why are triple-glazed windows eco-friendly?

    Triple-glazed windows are considered eco-friendly because they're effective heat insulators. They help to reduce heat loss in our homes, which makes our central heating systems more efficient. This, in turn, means less energy usage and a small step towards a brighter future for Planet Earth.


    Most of our triple-glazed windows are rated A++ on the BFRC's energy performance scale. This is the highest possible rating.

  • Does triple glazing keep heat out?

    Yes. Triple-glazed doors and windows are great insulators – and this superpower works both ways. As well as trapping heat inside your home, they help to keep heat out.


    In the UK, this is usually a good thing. In winter, triple glazing makes central heating more efficient by reducing heat loss. In summer, it keeps our homes nice and cool without the need for expensive air conditioning.

  • Will triple glazing reduce noise?

    Usually, yes. Triple glazing adds an extra glass barrier between your home and the outside world, which can help to deaden traffic noise and other nuisance sounds.


    You can improve its sound insulation properties even more by applying a simple plastic window covering.


  • Will triple glazing stop condensation?

    We can't promise it will stop condensation completely. However, it will almost certainly reduce it.


    Condensation forms when moist, warm air touches a cooler surface. With triple glazing, the gaps between the panes of glass help to trap warm air. This means the window itself stays warmer and is less likely to attract drips.


    This has a bonus benefit: it helps your windows last longer.


  • How much do triple-glazed windows cost?

    Since our products are tailor-made for every customer, it's impossible to provide cut-and-dry costs without knowing exactly what you're looking for.


    Generally speaking, however, triple-glazed windows cost a little more than their double-glazed counterparts. This is because of the extra materials they use, as well as the complexities of their manufacturing process.


    Is triple glazing worth the extra cost? If you buy through Calder, yes. Our triple-glazed doors and windows are among the most energy-efficient models available in the UK. This means you could save a packet on your energy bills, even if you're upgrading from modern double glazing.


    They unlock a host of other benefits too, such as reducing condensation and traffic noise.


    Still unsure? The best thing to do is contact us for a no-obligation quote. Then you'll have the facts you need to make a decision. (You might be pleasantly surprised by our triple-glazed window prices too.)