Alitherm Heritage | Steel Replacement

  • Alitherm Heritage is a range of Aluminium Windows and Doors design specifically for heritage applications such as conservation areas, listed building renovations and large scale replica-refurbishment projects where planning constraints are to be considered.

    The versatile Heritage range of Windows and Doors can be used for all refurbishment, new-build projects or extensions as both internal and external doors.

    The window system is designed to be built as a series of horizontal modules which can be stacked using horizontal couplers to form a multi-part window featuring a specially designed drip bar between modules replicating a traditional steel window.

    Alitherm profiles utilise Smart’s innovative polyamide thermal break technology which creates a barrier between the cold air outside and the warm air inside. This technology significantly reduces thermal transmittance and enhances the overall U Value of a product and is designed to meet the exacting requirements of Document L 2010.

    Alitherm products are available in a choice of standard or non-standard colours, including metallic, dual colour, Smart Architectural Aluminium Sensations textured, and Alchemy anodised effect finishes.

    • Fixed windows
    • Single or double sash, side hung open out casements
    • Top hung open out casements
    • Tilt/Turn windows
    • NEW! Heritage Bifold Doors – click here for more information

     NEW Heritage Bifold Doors banner

  • WER RatingB
    U Value1.5W/m²K (using 1.0W/m²K glass unit)
    AirClass 4, 600Pa
    WaterClass 9A, 600Pa
    WindClass AE, 2400Pa
    Document L CompliantYes
    BS 6375-1:2009Yes
    BS 4873Yes
    PAS 24:2012Yes
  • General

    Glazing (mm)24mm, 28mm, 32mm & 36mm double or triple glazed units
    Frame Depth (mm)47mm
    Typical Sightlines (mm)59mm


    Side Hung Max Width (mm)700mm
    Side Hung Max Height (mm)1400mm
    Side Hung Max Weight (kg)40kg


    Top Hung Max Width (mm)1400mm
    Top Hung Max Height (mm)1300mm
    Top Hung Max Weight (kg)35kg


    Tilt Turn Max Width (mm)1200mm
    Tilt Turn Min Width (mm)402mm
    Tilt Turn Max Height (mm)1600mm (at 900mm wide)
    Tilt Turn Min Height (mm)500mm
    Tilt Turn Max Weight (kg)90kg


    Single Door Leaf Min Width (mm)600mm
    Single Door Leaf Max Width (mm)900mm
    Single Door Leaf Max Height (mm)2100mm
    Door Sash Max Weight60kg

Installation Gallery

Black Alitherm Heritage Double Door
Alitherm Heritage Double Door and sidelights used as an internal room divider
Alitherm Heritage Double Door and sidelights used as an internal room divider
Black Alitherm Heritage Double Door, Sidelight and single matching window
Curved Aluminium Alitherm Heritage Windows
Alitherm Heritage Curved Head Windows
Alitherm Heritage Casement with shaped astragal bars - external view
Alitherm Heritage Casement with shaped astragal bars - internal view
Alitherm Heritage Gable frame and double doors with astragal bars
Black Alitherm Heritage Closeup
Alitherm Heritage Casement window
Aluminium Alitherm Heritage Curved Window
Aluminium Alitherm Heritage Curved Windows and doors
Aluminium Alitherm Heritage Curved Windows and doors
Aluminium Alitherm Heritage Curved Windows
Alitherm Heritage Casement windows and doors
Alitherm Heritage Casement window
Showroom Heritage Outside
Showroom Heritage Inside
Showroom Aluminium Heritage Outside
Aluminium Heritage Installed By Skyglaze
Heritage Aluminium Doors
Heritage Aluminium Doors - Internal View