uPVC Flush Casement Windows

Also available as wooden flush casement windows, and in bay window or cottage window styles.

Up to A++ rated
Dual agate grey uPVC flush windows

Colour options

Dual Agate Grey colour swatch from the Anglian flush window colours
Dual Agate Grey
Dual Black Ash colour swatch from the Anglian flush window colours
Dual Black Ash
Dual English Oak colour swatch from the Anglian flush window colours
Dual English Oak
Dual Grey Cedar colour swatch from the Anglian flush window colours
Dual Grey Cedar
English Oak colour swatch from the Anglian flush window colours
English Oak
Heritage White colour swatch from the Anglian flush window colours
Heritage White
Dual Anthracite Grey colour swatch from the Anglian window colours
Dual Anthracite Grey
Dual Cream colour swatch from the Anglian flush window colours
Dual Cream
Get Price Finance from just £249 deposit, 12.9% APR

For a stylish, secure and energy-efficient upgrade for your home, look no further than flush uPVC casement windows. Choose standard A+-rated double glazing or upgrade to A++ triple glazing for the best energy rated windows we offer. Made from strong, multi-chambered uPVC they’re a durable modern window designed to stand the test of time.

Tailor your uPVC flush casement windows to suit your home with plenty of customisable features to choose from. Match your windows to your traditional property with English Oak effect uPVC, or consider Anthracite Grey to give your modern house a touch of sophistication. Celebrate the unique character of your home with antique monkey tail handles or choose decorative glass like etched or coloured glass to blend your modern windows with your Victorian, Edwardian or 1930s home.

Double-glazed uPVC flush casement windows are BFRC-certified and rated A+ as standard for energy efficiency. For even better energy performance, they can be upgraded to A++ with triple glazing. This makes them some of the most energy-efficient windows you can get.

Upgrading from pre-2002 uPVC double-glazing to A+ rated windows from Anglian could save you £196.06 off your annual energy bills*. That’s more than £1900 over 10 years.

Flush uPVC windows have some of the best measurements for heat retention and excluding draughts. Losing less heat through your windows means you won't need to use your heating as much, which can lead to lower energy use and lower bills.

* Source Glass and Glazing Federation. A typical detached house has 23.7m2 of windows. Based on replacing uPVC double glazed windows with a 12-14mm sealed unit and gas central heating with A+ rated thermally efficient windows.

Our uPVC flush windows are a solid choice to increase home security and have a range of features to help protect your home from unwanted visitors.

  • Multi-point locking mechanisms secure the flush window to the frame at the top, bottom and sides. This makes it very difficult for an intruder to force the door open.
  • Lockable handles come as standard, so the window can’t be opened from the outside.
  • uPVC flush casement windows are Secured by Design accredited, a Police initiative to ‘design-out’ crime. All hinges are fixed to the frame with steel claws to protect that side of the window during an attempted break-in.
  • Glass is fitted from the inside of the frame when we make the window. Internal glazing means it is harder to remove glass from the outside.
  • The uPVC in our flush windows has a strong multi-chambered construction with welded joints for added strength.
  • Where required by building regulations, laminated shatter-resistant safety glass is fitted to provide extra protection against break-ins.

Your flush uPVC casement windows have a guarantee which covers the frames, glass, hardware and labour. Under the terms of a guarantee the cost of a partial or complete repair of your windows is covered. They’re also insurance-backed, so if we stopped trading during the life of a guarantee, it would still be valid.

  • 10-year guarantee on frames, parts and labour.
  • 15-year guarantee on all our sealed glass units. It is also covered if the unit “blows out”, meaning the airtight seal “blows” allowing condensation to form between the panes of glass.
  • 10-year guarantee on hardware, including locks, handles and hinges.


  • Secured by Design approved: this Police accreditation means our flush uPVC casement windows help keep buildings more secure from crime.
  • British Fenestration Rating Council (BFRC) accredited, the most trusted authority and rating system for energy performance in windows and doors. Our double-glazed uPVC flush casement windows are rated A+ and A++ with triple glazing.
  • FENSA and Glass and Glazing Federation (GGF) accredited, which ensures our flush uPVC casement windows are installed to the latest building regulations.

Flush uPVC casement windows come in a large range of configurations to suit different size rooms. Because no home is the same, we don’t believe in a one-size-fits-all approach. So your windows are made to measure for your home and each one is priced individually.

Here is a general guide to our uPVC flush casement window frame sizes:

Min height 385mm

Min width 385mm

Max height overall frame 3000mm

Max width overall frame 3000mm

Start your project today and enjoy it for longer. Spread the cost of your new flush casement windows with a low deposit of just £249 (12.9% APR) subject to affordability, status and lending criteria.

Buy uPVC Flush Casement Windows from as little as £99.65 per month spread over 96 months:

Window & Door Representative Example – 96 Months:

Contract price £6,340
Deposit £249
Amount of credit £6,091
Interest rate 12.2% per annum fixed
Representative 12.9%
Monthly Repayment £99.65
Total Term 96 Months
Total Amount Payable £9,815.40
Interest is charged from the date the account is opened. Current rate as at April 2024. Anglian Home Improvements is a trading name of Anglian Windows Limited and is a credit broker, not a lender. Anglian Home Improvements is a trading name of Anglian Windows Limited, Registered office: Liberator Road, Norwich, NR6 6EU. Registered in England No. 2540020. Authorised and regulated by the Financial Conduct Authority for consumer credit and non-investment and insurance activities.
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Customer Reviews

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  • Whole house renovation of replacement flush uPVC casement windows finished in Cream from the Anglian flush window range
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Our uPVC Flush Casement Windows are Made in the UK

Our uPVC flush casement windows are made to order and manufactured in the UK, with strict quality control checks at each stage of production. Our windows carry the BSI Kitemark which means they meet some of the highest industry standards. Once completed, we ship your order to your local team for installation. We even take your old windows away and break them down to responsibly recycle where possible.
White uPVC flush window at front of stone house

Our happy customers

Weyells before
Weyell Flush window interior after
Mr and Mrs Weyell, Cambridge

Dual coloured Anthracite Grey/ White uPVC flush window

“We bought a new house and our windows were in a poor state. We went with Anglian because their prices were good and they knew what they were talking about. The design team were very helpful, taking us through style and colour options, and we got to visit a showroom to help us make a decision. Excellent service and installation from Anglian and our new windows are really elegant.”
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Anthractite grey uPVC flush window

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Your Questions Answered by Us

Are flush uPVC windows more expensive?
Flush uPVC casement windows are popular because they are a cost effective option and less expensive than their wooden counterparts. They provide value for money, have brilliant energy efficiency and a host of security features. Choose timber effect windows over real wood to save money without compromising on style.
What are the best flush uPVC windows?
The best uPVC flush windows are Anglian uPVC triple-glazed which come with an A++ energy rating. Every home is different, and you can configure flush windows to suit a variety of styles, like bay or cottage windows. Fit your flush uPVC windows to match the aesthetic of your home and its surroundings.
What does flush uPVC mean?
uPVC is the material that the window casement and frames are made from. Flush uPVC windows refer to the style and are top or side hung windows that fit flush within their frames when closed. This is different from traditional casement windows, which have a lip that protrudes out from the frame.
Should you choose uPVC or wood flush windows?
uPVC and wood flush windows are good choices for your home. Both could be suitable for conservation areas and listed buildings, but uPVC lends itself better to modern homes. uPVC is also more energy-efficient, rated A++ with our triple glazing option. uPVC doesn’t require the maintenance of wood, making it cheaper over time.
How do you clean flush uPVC windows?
Our flush uPVC windows are cleaned by wiping with a cloth and soapy water. What could be simpler? They need very little maintenance, and will not rot, flake or rust, which makes them more cost-effective over the long term than wooden flush windows. Read our handy guide on window maintenance for more information.
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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.
  • BFRC logo
    The British Fenestration Ratings Council is the UK’s national system for rating energy efficient windows.
  • bsienhancedsecurityofwindows2x
  • BSEN12608 Windows and Doors accreditation
  • 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).
  • Made in Britain logo
    Certifies products made from start to finish in a British factory by British craftspeople.
  • 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.