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uPVC Sliding Sash Windows

Our uPVC sash windows replicate the elegance of the Victorian and Georgian eras with the benefits of modern performance. Individually crafted for a perfect fit, they’re guaranteed to open and close smoothly. They also offer great energy efficiency to help keep your home warm and reduce your heating bills. The latest security features are designed to keep your home secure.

Each uPVC sash window is individually-made with your choice of frame, glass and configuration.

  • Give your home traditional charm with modern fittings
  • Smooth to open and draught-free when closed
  • Energy efficient – can help reduce your heating bills
  • Secure – shoot-bolt locks, key locking handles and toughened glass
  • Effective noise reduction – great for drowning out external sounds

Our sliding sash windows' energy-efficient construction comes with A rated glass as standard to help reduce your heating bills and keep your home warm when it's cold outside. We can even make them tilt so cleaning is easy.

It's simple to find the cost and energy savings you're looking for – one of our Anglian designers will visit you at home to give expert advice based on your particular needs and show you the benefits of upgrading to A+ rated glass or installing Safe & Sound glass. They'll also guide you through deciding on decorative bars and glass to give your home the style you’re looking for.

Once you've decided what you want, they can give you an accurate quote. Our craftsmen will make your sash windows to your exact specifications, ensuring that they fit perfectly.

up to 50% off windows up to 50% off windows
  • 10 year guarantee
  • Established in 1966
  • Made in Britain

Explore our range of frame and glass options

Frame options
White Knight uPVC sash window
All dual colours are white on inside

See how your uPVC Sliding Sash Windows could look by selecting the colour and handles of your choice.

Outside View
Select frame colour
Each window material offers a wide choice of colours for the outside of the frames. With our uPVC windows, you also have a dual colour option combining Woodgrain or Anthracite Grey on the outside with White Knight on the inside.
Single colour

Same colour on the inside and out

Dual colour

Different colours on the inside and out

explore handle & frame options
Here are some of the most popular frame configurations

Your designer will talk you through the vast range of options available to suit your needs

  • Curved sash window configuration
  • Double sash window configuration
  • Sash window configuration
  • Triple sash window configuration
White Knight uPVC sash window
Inside View
Select your handles

You can choose from a range of handle colours and more

White Knight uPVC sash window Chrome sash window handles
Glass options

Your designer will help you select the type of glass that’s most suited to each room in your home to give you the best levels of energy-savings, security, noise reduction and privacy.

You can also give your windows the look you want by choosing from our plain, decorative or obscured glass and insert options.

Sash window clear glass
Select glass type
We make every glass panel uniquely for your windows and offer you an exciting choice of clear, obscure, etched and leaded glass, as well as decorative designs and bars. Your Anglian designer can help you choose the right glass for each window during your appointment.
Glazing Options
  • Double Glazing
  • Safe & Sound
    Anglian's standard A rated windows provide an ideal level of sound reduction at 31dB but if you need even higher levels of sound insulation you can opt for our Safe & Sound glazing which uses 6.4mm laminated glass on the outside and a 4mm inner pane, with a 14mm cavity, increasing the sound insulation to 36dB. That's a 16% improvement. More about Safe & Sound.
Energy rating/performance options
These tell you how much energy a window loses or gains. They’re based on three factors – how much heat is retained or lost through the window, how much heat can be harvested from the sun and how much heat is lost through draughts. More about energy ratings
  • A+
  • A
  • B

With a wide selection of frame configurations and the option of a wood-effect, white, or our popular White Knight finish, your uPVC sash windows will make a stunning addition to your home. Touches such as decorative, etched or leaded glass, window bars and your choice of handles and hinges, complete the look. The latest security features will help to keep you safe, and you can select your preferred energy rating or sound reducing glass to reduce noise.

Be inspired by our customers who have transformed their homes

Upgrade & EnjoyModern technology suitable for period homes

Martin and Gill wanted to replace their windows with something more in keeping with 21st century standards, without destroying the integrity of their home and causing an outcry among their neighbours. They took their questions to the local planning authority, backed by a company with a reputation that spans nearly five decades.

“We moved into a conservation area,” explains Martin. “We had used Anglian before at our previous home and were very happy with their approach. The company talked to our local planning officers who were happy that our old draughty windows were going to be changed for highly energy efficient windows that looked like wood.”

“While the team of fitters were extracting some 1960s casement windows, they discovered some old sash boxes, so we had new sliding sash windows put in. It looks more like a restoration than a renovation.”

“I’ve been amazed at the change in temperature and the cold spots that have disappeared. I wouldn’t have believed the change it has made – it’s absolutely amazing!” says Martin.

Anglian case study - Troughton

Why Choose Anglian?

We understand that replacing your windows is a big commitment, so understanding the Benefits of Anglian Glazed Windows is an important part of your decision-making. We work hard to ensure that everything from planning to payment easy and straightforward for you and confidently guarantee the quality of our products for up to 15 years.


We design and make each window individually to guarantee its standard and believe that our know-how, craftsmanship and experience mean we offer unbeatable quality.

  • Made in Britain
  • BBA certified products
  • Premium materials
  • Fast and professional installation
Read about our accreditations


We know that you'll enjoy your windows for many years to come, and offer a set of guarantees for extra peace of mind:

  • 10-year guarantee on uPVC, wood and aluminium
  • 5-year guarantee on stained wooden windows
  • 15-year guarantee on our Ultra gas filled units
  • Additional Glass & Glazing Federation (GGF) protection
Our guarantees

Our Accreditations

Feefo accreditation
Awarded Feefo Trusted Merchant for customer satisfaction in 2015 & 2016
British Board of Agrement windows accreditation
The British Board of Agrement provides certification on the quality of our products.
Energy Saving Trust logo
Windows with a WER rating of A or above can be registered with the Energy Saving Trust.
Trustmark logo
TrustMark is a government endorsed not-for-profit organisation that operates a quality mark framework through more than 30 scheme operators who work in the repair, maintenance and improvement sector.
Glass and Glazing Federation logo
Anglian is a leading member of the Glass and Glazing Federation (GGF).
Made in Britain logo
Certifies products made from start to finish in a British factory by British craftspeople.
The Glazing Arbitration Scheme Logo
Independent service that deals with disputes between registered businesses and consumers.

Customer Reviews

Windows FAQs

Find out more about double and triple glazing in our useful Window FAQs Section or read our articles below.

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Anglian FAQs

Got questions about choosing Anglian? Find out why Anglian is the right choice for your replacement windows.

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Home Inspiration From Anglian

Need help deciding on your windows beween sash and all the other options? Or are you full of enthusiasm about transforming your home but need a little guidance on how to do it? Look no further than our "Good to be Home" online magazine - it's brimming with ideas - and gives you a peek at other people's homes too!