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Sophisticated styles to suit a wealth of applications

Alitherm 600 windows can be manufactured to meet the demands of a huge range of applications, whilst always achieving a premium feel. An increasingly popular choice for homeowners and on commercial properties, their profiles can be square, ovolo or chamfered, to resemble everything from traditional timber casement windows to modern varieties.

With frame depths as slender as 59mm, they offer better natural light intake than a huge range of competing casement window systems too.

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Bespoke aluminium casement window colours

We have an extensive selection of bespoke colours and any RAL colour available for the finish, ensuring you can adapt their appearance to meet even the most demanding project requires. You can find a number of popular colour options below, although the full colour range is available via the link here.

  • Specification
  • Performance
  • Dimensions
  • Downloads
  • Specification

    Brand Alitherm
    Material Aluminium Polyamide
    Dual Colour Yes
    Thermally Broken Yes
    NBS Available Yes


    WER Rating B
    U Value 1.3W/m²K (using correct glass unit)
    Document L Compliant Yes
    Kitemark Yes
    BS 6375-1:2009 Yes
    BS 7950:1997 Yes
    BS 4873 Yes


    Side Hung Max Width (mm) 1000mm
    Side Hung Max Height (mm) 1400mm
    Top Hung Max Width (mm) 1400mm
    Top Hung Max Height (mm) 1500mm
    Glazing (mm) 28mm to 38mm double or triple glazed units
    Frame Depth (mm) 59mm & 70mm


    Smart Alitherm Windows

    Thermally broken and ultra-secure

    For applications requiring stylish aluminium casement windows that are able to create warm, energy-efficient environments, Alitherm 600 casements are perfect. Thermally broken with the latest polyamide thermal technology, they exceed the minimum requirements for Document L, achieving U-values as low as 1.4 W/m²k.

    Whatever style you require, however, rest assured that excellent security comes guaranteed; Alitherm 600 profiles are PAS24:2012 accredited and we fit them with a selection of leading security hardware from Yale.

    Contact us

    Get in touch today for a free quote

    Simply fill out our online quotation form providing your specifications and a member of our team will be in touch with a quote.

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    Free Delivery Nationwide

    Our fast and efficient workforce will deliver anywhere in the UK at no extra cost within 10 working days of ordering.


    High Quality Guaranteed

    Our factory is equipped with the latest machinery ensuring high quality performance & maximum productivity, bringing you a swift turnaround at a competitive price.


    Technical Expertise

    As well as manufacturing, our team of technical experts and specialised installers can offer guidance and assistance to meet your needs.

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