uPVC casement windows

Casements are our most popular window styles, and offer great versatility because they can be hinged at the top, at either side, or at the bottom. To give some examples, the biggest selling types of GM Windows casement window include a top-hinged casement that opens over a fixed window, a single side-opening window beside a fixed pane, and a simple single opener.

Casement windows from Gm windows are a popular choice because they provide a clear view to the outdoors. Casement windows open and close easily with the turn of a handle.

  • A+ rated windows or triple glazing
  • Custom sizing available
  • Extensive hardware selection
  • Energy efficient

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The real beauty of the GM Windows range of casement windows is that each unit can be adapted in any combination to suit any home or individual space. You can specify exactly what combination of casement panes you want to fill your window space, choosing from a huge range of sizes and styles, colours and finishes, and leave the rest to us.

All GM Windows casement windows are made to measure. One of our authorised installers will offer you expert guidance and all the advice you need to choose the perfect combination for your home.

We pride ourselves in offering complete flexibility – meaning that we will provide the best advice on installing windows that will perfectly suit your home, no matter its size, age, architectural style or location.

Hazy Grey
Beck Brown
Dark Green
Cream White
Anthracite Grey
Chartwell Green
Irish Oak
light oak


At GM Windows, we want to offer our customers complete adaptability and versatility. Because each of our PVC-U window installations is tailored to suit its specific location, no two are exactly the same. And to make sure that every window completely fits in with its surroundings, we offer a contemporary colour range to match every style.

GM Windows & Doors Options Colour Range has been selected with modern homeowners in mind. The Cream White is a warm cream colour that complements a range of styles, but is ideally suited to both modern and traditional red brick homes. A new addition to the range is Agate Grey, a subtle blend of beige, green and cream which we know will prove very popular on new and renovated homes, especially barn conversions.


Siena PR
White Grain
Steel Blue
Dark Red
Slate Grey