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uPVC Casement Windows

Our most popular window. Side-hung and top-hung openers in any layout, in four profile systems. Read our guide

Trade account? Get 10% off
Drawn to scale from your sizes, viewed from outside. A visual guide only, not a manufacturing drawing.
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Estimated delivery–
See how this price is made up
Not sure about a measurement? Call us Mon–Fri, 8am–5pm on 020 3488 9299.
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Enter your size

Start with your frame size and we'll show the styles that fit. Not measured yet? Pick a standard size for now, or see how to measure.

How to measure
  1. Measure brick to brick across the top, middle and bottom of the opening.
  2. Measure the height on the left, centre and right.
  3. Take the smallest of each, then deduct 10mm for fitting clearance.
  4. Enter the frame size. The cill is added on top, so leave it out.
Read the full measuring guide →
2

Choose a style that fits

7

Check & order

Printed on the frame sticker, so you know where each window goes. Add a RAL number here if you need to.
Not ready to order? Save this design and we'll email you a link and your quote. Your reference works on any device.

About our made-to-measure uPVC casement windows

uPVC casement windows are the most popular window style in UK homes, and our most popular range. Side-hung and top-hung openers can be combined in almost any layout, in four profile systems, and you see the price change as you design.

Every window is made to your sizes in our Essex factory and delivered across the UK mainland.

Casement window layouts and profiles

The designer offers 25 layouts, grouped by pane count. They range from a single fixed pane or side opener to four-pane windows, French casements and French casements with side lights. Any hinged layout can be swapped left or right with one click.

Choose from four A-rated profile systems:

  • Liniar: premium British-made profile with a multi-chamber frame.
  • REHAU: premium German-engineered profile, known for long life and crisp detailing.
  • Eurocell: a popular British profile that balances price, looks and performance.
  • Selecta: our lowest-priced A-rated profile, ideal for rentals and budget projects.

Not sure which suits you? Our guide to window profiles compares them.

Finishes, glass and hardware

  • Profile finish: chamfered (bevelled, the most common choice) or ovolo (softly rounded, for period and cottage homes).
  • Colours: white, Anthracite Grey (RAL 7016), black, Agate Grey, Chartwell Green, cream, and Golden Oak, Rosewood or Irish Oak woodgrain. Choose white inside or the same colour on both faces.
  • Glazing: A-rated 28mm double glazed units with a warm edge spacer and argon gas, or triple glazing for lower heat loss and less outside noise. Clear or obscure glass.
  • Handles: every opener has a locking handle, in white, black, chrome, gold or graphite.
  • Cills and drainage: stub (85mm), 150mm, 180mm or 220mm cill, or none if you are keeping your existing cill. Faced or concealed drainage.
  • Extras: toughened safety glass, Georgian bars, trickle vents, child restrictors and a fitting kit.

Building Regulations require safety glass within 800mm of the floor and next to doors, and most replacements need trickle vents. The designer flags both.

Measuring and ordering

Measure brick to brick across the top, middle and bottom of the opening, and the height on the left, centre and right. Take the smallest of each and deduct 10mm for fitting clearance. Enter the frame size only, as the cill is added on top.

The live scale drawing shows your window from inside or outside, and you can label each window and save designs before ordering.

Delivery, lead times and guarantee

Standard sizes are made in 5 to 7 working days and made-to-measure windows in 10 to 14 working days. UK mainland delivery is £39 inc VAT, or free on orders over £300. Frames, sealed units and foils carry a 10-year guarantee, and hardware 1 year.

Trade customers get ex-VAT pricing and 10% off with a trade account.

Questions about uPVC casement windows

Can I return a casement window if I change my mind?

Made-to-measure windows are built to your sizes, so they can't be returned for a change of mind. Please check your measurements before ordering.

Do you fit the windows?

We supply only. You can find an installer near you through our help pages.

Should I choose double or triple glazing?

Double glazing is A-rated and suits most homes. Triple glazing adds a third pane for lower heat loss and less noise.

Can I get help with my design?

Yes. Call us on 020 3488 9299, Monday to Friday, 8am to 5pm.

Before you order, read our full guide on how to measure windows.

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