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ALITHERM 400 DOOR & WINDOW SYSTEM

Today, aluminium is the go-to choice for those with a taste for high quality, contemporary living, stylish aesthetics, and exceptional performance. Our Alitherm 400 range of window and door systems embodies these ideals, offering modern design and flexible operation to enhance any space.

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Discover the ALITHERM 400 Excellence in Design and Functionality

Its innovative design features polyamide thermal break technology that significantly reduces thermal transmittance by creating a barrier between the cold air outside and warm air inside, enhancing the systems overall ‘U’ value.


The system is also rigorously tested to PAS 24:2016 as standard and exceeds the requirements for weather resistance and security performance.

Install with Confidence


At a Glance:


  • Regulation Compliance: Fully compliant with the latest updates to Document L of the building regulations.
  • Performance: Enhanced thermal and weather performance.
  • Glazing Efficiency: Brand new quick glaze bead for a simpler, faster, and cost-effective glazing process.
  • Security: PAS 24: 2016 approved for added security.
  • Colour Options: Unlimited colour choice available through any RAL colour, in addition to four stock colour collections.


Prior Products: Quality and Innovation at Heart


Key Features of Aluminium Windows


  • Narrow Profiles and Slim Sightlines: Enhance the look of your property.
  • Material Benefits:Lightweight, strong, and nearly 100% recyclable aluminium ensures sustainability.
  • Inherent Strength:Improved property security with no concerns about rust or warping, and minimal maintenance.
  • Colour Versatility: A vast array of colours to match your property, including dual-colour options for different inside and outside colours.


We offer a complete range of window styles to complement your property, providing you with a reliable and attractive finish.

Contemporary Aluminium Windows

If you want that stylish, modern look with clean lines and a sleek profile then our Contemporary Aluminium windows are the perfect choice for you.


Through innovative design and superior build quality, this window system offers high thermal and acoustic performance alongside the inherent strength and low maintenance benefits of aluminium to make your home safe and secure.

Aluminium Windows
Aluminium Windows

Panoramic Aluminium Windows

For floor to ceiling glazing that offers unencumbered views from your property with minimal framing, our Panoramic window system is the perfect choice for you.


Opening up a room to let the light flood in, Panoramic windows have narrow framing and can offer uninterrupted glazing to a height of 2 storeys. They are also tested to PAS24 and are built using strong but lightweight aluminium, combining aesthetics with improved security for you home.

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