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Treat your home to a total transformation with Eco Diamond ™ windows

Enhance your home with our range of EcoDiamond™ casement windows that not only look fantastic, but are rigorously tested to exceed the standards for security, heat retention and weather performance. With ten frame colour options, a choice of handle and numerous customisation options EcoDiamond™ offers a flexible solution to really personalise your home.

  • A range of colours, styles and options to suit your property
  • Give your home a clean, fresh look with uPVC casement windows
  • Rigorously tested to exceed industry standards
  • A-Rated to achieve outstanding heat retention and minimum heat loss

We'll beat anyone's prices including sale prices!*

Call Us Now on 0808 274 8283

Casement window styles and colours

Find the perfect window for your property by discovering our uPVC casement windows, available in a range of 10 fantastic colours. Whether you choose a sleek and modern grey, a stylish chartwell green or a more traditional white, we have designs and styles to enhance any home.

anthracite grey

Anthracite Grey



Chartwell window cut out


Cream window


Golden oak

Golden Oak

Irish oak

Irish Oak




Slate Grey

White Window


White wood grain

White Woodgrain

Glazing, decorative features and added functionality

Select an option to find out more

Our windows are available in a variety of configurations

Please speak to us if you don't see the configuration you're looking for.

Cosy customer

Keep your home warm and feel the benefits of reduced energy bills.

With a design focussed on keeping you warm and eliminating draughts our A-rated EcoDiamond windows are independently tested by the British Fenestration Rating Council.

  • EcoDiamond glass - with Pilkington Optifloat™ and Pilkington K glass™ technology
  • Multi chamber frame - 5 chamber profile insulates
  • Recommended by the Energy Saving Trust
  • Q-Lon seals - keep the draughts and weather outside

The Benefits of Safestyle Casement Windows

Tape measure

Precision made-to-measure

We custom make each of our frames to suit your home for an air-tight seal and better security

Multipoint locks

Multipoint locks

Our EcoDiamond product ranges all feature multipoint locking for security and peace of mind

Expert fitters

Expert fitters

We have hundreds of experienced fitting teams throughout the country

Internally beaded

Internally beaded

Preventing the removal of the beading to gain entry

Dedicated service engineers

Dedicated service engineers

Throughout the country should you need a repair or replacement

A rated

A-rated energy efficient

Ensures maximum heat retention and minimum heat loss

Environmentally friendly

Environmentally friendly

We remove your old windows and recycle 95% of all our waste


UK made

Proudly made in our 18 acre factory in Yorkshire

Price promise

Price promise

With our lowest price guarantee we’ll beat any like-for-like quote

Trusted and rated

Trusted and rated

89% of customers who reviewed us say they would recommend us


Quotes valid for 12 months

A free, clear and simple quote, then we give you plenty of time to decide

10 Year Guarantee

10 Year Guarantee

We promise you’ll get a decade at the very least of worry-free, virtually maintenance-free pleasure from your Safestyle uPVC window


  • Internally beaded - so the glass can’t be removed from the outside
  • BSI kitemarked - rigorously tested to ensure the highest possible standards
  • Trident multipoint locking - securely anchoring the frame and opener
  • Precision installation - Making it harder for would-be intruders
  • Multi chamber frame - a robust 70mm frame profile that’s steel reinforced where necessary
  • Pro Linea handle - with push button and key locking for extra assurance

Energy saving

  • Recommended by the Energy Saving Trust
  • A-rated by the BFRC meeting the energy performance criteria agreed by the industry experts
  • Allows free heat energy in from solar gain
  • Reduces the heat lost through your windows with EcoDiamond glass technology
  • Eliminates draughts and leaks with a precision installation

uPVC Casement Window FAQs

What is a casement window?

Casement windows are a common and traditional choice of windows in the UK and are attached to their frames by hinges at the side. They help with ventilation thanks to their hinge positioning, which allows them to be opened easily and effectively.

Are casement windows better than other options?

Casement windows are a really solid choice and are one of our most popular window types at Safestyle. They are well-insulated, very secure, simple to use, and highly customisable - you can choose your uPVC casement windows in a range of colours and styles.

Are casement windows more expensive?

As we manufacture our own windows in our state of the art UK factory, we are in a great position to offer the best prices for your new casement windows. Prices may of course vary depending on the number of windows you require, the style or colour you choose, etc. At Safestyle we offer a lowest price guarantee meaning we will promise to beat any like-for-like quote for your windows.

What's the difference between casement and sash windows?

Traditionally casement windows tend to open outwards and swing vertically, with just one pane of glass. Sash windows in contrast tend to have two glass panels that open via a sliding motion - up and down. In terms of design, sash windows tend to have more of a traditional, Georgian appearance, while Casement tend to suit more modern properties. At Safestyle we offer sash windows with a sliding or tilted opening mechanism so you can customise your choices based on preference & your house requirements too.

How long do casement windows last?

uPVC casement windows are a solid, long-lasting window choice. At Safestyle we offer a 10 year guarantee so you can enjoy a decade of worry-free and low-maintenance pleasure from your windows. You can keep your new windows looking their best for many years to come by following a few simple tips.

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