Steel Replacement

Heritage Windows
The comfort of your home

why heritage windows

Super Slim Line

Alitherm Heritage provides the ideal solution for heritage applications such as listed building renovations and large scale replica-refurbishment projects where planning constraints are to be considered.

The window 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 design drip bar between modules.

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’s Sensations textured, and Alchemy anodised effect finishes.

Innovation & USP’S/

  • Ultracienkie skrzydlo centralne tylko 25mm
  • Szklenie do 54mm – glazing up to 54mm
  • Hidden rail – possibility to embed the bottom profile and integrating it with the finish floor wooden, tiles etc. – See gallery
  • Electric motor controlled by remote control or push button
  • Współczynnik przenikania ciepła 0,9 Wm2/K/ low u value 0,9 Wm2/K
  • Microventilation
  • Hidden drainage system


  • Side Hung Max Width (mm)
    Side Hung Max Height (mm)
    Side Hung Max Weight (kg)
    Glazing (mm) / Szklenie (mm)
    Frame Depth (mm) Glebokośc ramy

Thermal Performance

  • Uw from 1,3 (W/m²K)
  • Air permeability – (EN 12207:2000) CLASS 4
  • Water tightness – (EN 12208:2000) CLASS 7A
  • Wind resistance – (EN 12210:2000) CLASS C5
  • Soft coat low E glass as standard
  • Argon gas as standard


  • Multi-point espagnolette locking system
  • Key-lockable handles – option
  • WK2 and even WK3 security with UK Secured By Design security,PAS 24:2012 or BS7950 depending on window type –

Configuration & Options

  • Optional astragal bars  wewnątrzszybowe
  • Optional leaded lights
  • Thermally broken sills 
  • Single or double doors 
  • Slim sightlines 
  • Tape or gasket Glazer 
  • Multi point locking and face mounted shoot bolts 
  • Polyamide thermal break provides enhanced thermal performance
  • Single or dual colour, marine quality polyester powder coat as standard
  • 316 Marine Grade Stainless Steel Hardware options
  • Heritage and Art Deco hardware options  


  • Possibility of  bicolor systems –
  • Color powder coating 400 coulours including structure finish
  • Wood effect
  • Anodized

request a quotation

Please complete your details and a member of our team will contact you as soon as possible to discuss your requirements and provide a free, no-obligation quotation for your glazing.

    contact us

  • 3 Spa Drive, Epsom

    Phone: 07849621941