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Triple Glazed Windows

Our A+ rated triple-glazed windows are the perfect choice for a warm and energy-efficient home. The third pane of glass improves heat retention, helping to save on your energy bills.

Triple glazing is ideal for north-facing windows or those where there isn’t much natural sunlight. Here, it provides the best insulation properties compared to double glazing. This means a triple-glazed window isn’t always needed in every room. Mix and match your windows to suit the aspect and elevation of your home.

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  • White Triple Glazing Window Interior in Open Position
  • White uPVC Casement Triple Glazing Window in Open Position Close Up
  • White uPVC Casement Triple Glazing Window Exterior
  • White Triple Glazing Window Exterior
  • White Triple Glazing Window Interior Close Up
  • White Triple Glazing Window Exterior in Open Position

Triple-glazed windows have three panes of glass, one more than double-glazed. The space between the glass is filled with an extra layer of insulating inert gas, like argon. Together with the third pane of glass, triple glazing often has a higher energy rating than double glazing. It helps to keep your home warmer, quieter and safer.

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Reasons to Choose Triple Glazed Windows

  1. Increase Energy Efficiency

    Our triple glazing is A+ rated as standard, but can reach up to A++ with uPVC flush windows. Increased efficiency means you use less energy to heat your home, lowering your bills.

  2. Add Value to Your Home

    Triple glazing improves overall energy efficiency of your home, increasing your Energy Performance Certificate score. Getting a higher rating will add value to your home.

  3. Decrease Outside Noise

    The three glass panes reduce external noise penetrating your windows. Perfect for city homes and those on main roads.

  4. Enjoy a Warmer Home

    Triple glazing stops warmth escaping your room, while at the same time keeping the cold out. This makes them perfect for colder rooms that don’t get much sunlight.

  5. Reduces Condensation

    The extra insulation in triple glazing means a warmer inner glass pane. This lowers the chances of condensation forming when humid air meets cold glass.

Triple glazed UPVC windows and French doors finished in white on large family home from the Anglian windows and doors range

Working with the Best Industry Bodies to Install the Best Triple Glazing

  • British Board of Agrement accreditation for uPVC windows from Anglian Home Improvements

    BBA Certificate for uPVC windows

    The British Board of Agreement provides independent accreditations for the construction industry. BBA-certified products are synonymous with quality. This accreditation covers our White Knight uPVC casement and tilt and turn windows.

  • BFRC logo


    The British Fenestration Rating Council (BFRC) verifies the energy performance of windows and doors in the UK. Installing BFRC rated energy-efficient windows will help save money on your energy bills.

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    BSI Kitemark

    The BSI Kitemark™ is one of the most recognised symbols of high quality products and safety standards. Anglian has 10 Kitemark accreditations, with six for windows alone.

  • FENSA logo


    The Fenestration Self-Assessment Scheme (FENSA) ensures replacement window and door installations comply with building regulations for England and Wales. You receive a FENSA certificate to keep as proof of compliance.

  • Glass and Glazing Federation logo


    Anglian is a leading member of the Glass and Glazing Federation (GGF). The GGF is the most influential Trade Federation in the industry, recognised by government for their in-house technical expertise, which helps influence key legislation within our sector.

  • Made in Britain logo

    Made in Britain

    The ‘Made in Britain’ marque on all our products means they are made from start to finish in a British factory by British craftspeople.

  • Recovinyl Plus logo

    Recovinyl Plus

    Recovinyl is an initiative advancing the sustainable development of the European PVC industry by improving production processes, minimise emissions, develop recycling technology and boost the collection and recycling of waste.

  • TrustMark

    TrustMark is a not-for-profit organisation operating a quality mark framework in the repair, maintenance and improvement sector. Registration with Trustmark demonstrates commitment to customer service, high standards and continual improvement.

Compare Triple Glazing Styles

A energy rating
A+ energy rating
A++ energy rating
Casement Windows
Flush windows
Tilt & Turn windows
Bay windows

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10-year Guarantee

A 10-year parts and labour guarantee is included in your Anglian double glazing price.

Made in Britain

Made in Britain

Our products are made from start to finish in a British factory by skilled craftspeople.

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Price Match

If you find cheaper like for like uPVC windows elsewhere, we'll match the price.

Decide if Triple Glazed Windows are right for Your Home

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Your Questions Answered by Us

Is triple glazing worth it?

Triple glazing is definitely worth having. Triple glazing provides the best insulation for your home, helping reduce your energy bills in winter. Triple glazing makes the most difference in north facing rooms or rooms more exposed to the weather. Triple glazing can also add value to your property, helping increase its EPC rating.

Is triple glazing better than double-glazing?
Triple glazing is better than double for colder rooms because of its insulation qualities. It stops heat escaping the rooms that need it most. However, double glazing works better in south-facing rooms because it lets in more of the sun’s heat, but doesn’t lock it in like triple glazing does.
How long do triple-glazed windows last?
How long triple-glazed windows last depends on their frame material and where they are placed, but they can last for from 20 years upwards. With proper care and maintenance, this can be even longer. Our White Knight uPVC in our triple-glazed casement and tilt and turn windows hold the BBA accreditation, which means they can last more than 35 years.
Does triple glazing cost more than double glazing?
On average, triple-glazed windows cost about a third more than double-glazed. This is due to the extra materials required to make triple glazing. Typically this means you are paying for a higher energy rating than double glazing, to keep rooms warmer for longer and reduce the amount of heating you use. There is usually a bigger saving over time versus double glazing.
Is triple glazing good in summer?
Triple-glazed windows are good in summer, but it depends where they are in the home. Triple glazing lets in less of the sun’s heat, retains more warmth and reflects it back into your room more than double glazing. So installing it in rooms that get a lot of sunlight would make them hotter than if you had double glazing, even though they let in less of the sun’s heat.

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Our Accreditations and Licenses

  • British Board of Agrement accreditation for uPVC windows from Anglian Home Improvements
    The British Board of Agrement provides certification on the quality of our products.
  • Anglian’s PVC-U Casement and Tilt & Turn windows have enhanced security performance.
  • BFRC logo
    The British Fenestration Ratings Council is the UK’s national system for rating energy efficient windows.
  • FENSA logo
    The Fenestration Self-Assessment Scheme ensures window installers comply with buildings regulations in England & Wales.
  • Glass and Glazing Federation logo
    Anglian is a leading member of the Glass and Glazing Federation (GGF).
  • Recovinyl Plus logo
    PVC Industry initiative to improve manufacturing, minimise emissions and develop recycling practices
  • TrustMark is a government endorsed not-for-profit organisation that operates through more than 30 scheme operators.