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casement windows
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70mm Casement Windows

These 70mm casement windows are the perfect option for keeping your home warm and secure. They have great features, opening in the classic casement window style and are well insulated using the standard 28mm double glazing. Manufactured using long-lasting and weather resistant uPVC frames, these casement windows are low-maintenance and durable. An environmentally friendly replacement for your old windows, or ideal for new build developments.

We only use the best quality materials for our products, and these windows can be specified to meet the new A+BFRC energy rating, achieving the most energy efficient rating possible. Save money on your energy bills and be kinder to the environment by installing these simple but effective casement windows.

Design Features

  • Internally glazed frames, making the positioning of the glass more secure against intruders
  • 28mm double glazing, for ultimate heat and acoustic insulation
  • Sealed units to keep your home draught-free
  • Tested according to high security standards
  • Secured by Design (SBD) status
  • Utilises Energy Saving, low E glass
  • Chamfered or Sculptured frame options

Frame Options  

Chamfered Frame

The Chamfered frame has a flatter, neater appearance, with more of the glass being visible and the uPVC being thinner. This means more daylight can enter your home. This style of window is ideally suited to a wide range of properties, especially for when you want to take advantage of the extra light.

Sculptured Frame

Our Sculptured frame has a more rounded and decorative finish than the Chamfered profile. This style is the ideal application for conservatories or generally larger windows, where the extra amount of light is not an issue.

Additional Information

We have an extensive range of handles, colours, and finishes, so you can select the style that suits your property aesthetic. We also have many glass options, so we can fit your needs with the right tint, obscuration, patterns, or decoration.

By ordering with Callidus Installations, we offer a 10-year guarantee on your windows, so once you purchase your 70mm casement windows with us you can enjoy them worry-free.

Enquire with us to find out more about our additional features or anything else we can help you with!


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