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    Why choose a Alitherm Heritage Windows

    Providing a modern, like-for-like replacement for traditional materials, Alitherm Heritage is the ideal solution for projects where planning or design demands dictate the installation of sympathetic materials.

    The benefits of Alitherm Heritage Windows are:

    • Designed to offer a modern solution
    • Ideal for listed windows
    • Ideal for replacing old steel windows
    • Uses thermal break technology
    • Designed to meet building regulations

    Steel Window Replacements

    Providing a modern, like-for-like replacement for steel windows. The Alitherm Heritage window range features the slim profiles and sight lines that are associated with traditional steel doors and windows. However, the system’s timeless elegance is also accompanied by the outstanding thermal performance of a modern aluminium system – each delivering a ‘B’ Energy Rating. Featuring slim, thermally-broken profiles, Alitherm Heritage windows are available in a number of formats.

    Slimline Windows

    Inspired by the aesthetics of traditional steel windows, Alitherm Heritage features signature slim sightlines and attractive contours making it the ideal choice for heritage building conservation areas where building regulations demand a like-for-like replacement.

    Listed Buildings and Conservation Areas

    The Alitherm Heritage range is specifically designed to meet the requirements of refurbishment and renewal projects on listed buildings and in conservation areas. Ideal for Victorian and Art Deco projects, the range of commercial and residential windows and balcony doors are already proven in a wide range of renovation, refurbishment and heritage projects across the UK.

    Colour Options

    Our Heritage windows comes in a choice of 3 hard-wearing colour finishes, including white, anthracite and black offering stunning ultra slim, clean and modern look. Please call to enquire about other options.

    RAL 7016
    RAL colours

    Personalise your Heritage Window

    Technical Specifications

    Element Specification
    Fixed Max Width (mm) 1200mm (per sash)
    Fixed Max Height (mm) 2500mm (per sash)
    Fixed Max Weight (kg) 100kg (per sash)
    Slide Folding Door Max Width (mm) 1200mm (per sash)
    Slide Folding Door Max Height (mm) 2500mm (per sash)
    Slide Folding Door Max Weight (kg) 100kg
    Glazing (mm) 24mm, 28mm, 32mm, 34mm, 36mm
    Frame Depth (mm) 70mm
    Typical Sightlines (mm) 132mm
    U Value 1.5W/m²K using 1.0 W/m²K centre pane
    Air Class 4, 600Pa
    Water Class E, 750Pa
    Wind Class 4, 1800Pa
    Document L Compliant Yes
    BS 6375-1:2009 Yes
    PAS 24:2012 Yes (Possible if Requested)