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Alitherm Heritage Aluminium Window System
Designed for Heritage and Planning-Sensitive Projects. Alitherm Heritage is specifically developed for use in heritage-led applications, including listed building refurbishments and large-scale replica replacement schemes where planning requirements must be carefully addressed.
Why Choose Alitherm Heritage?
The system is engineered as a series of horizontal sections that can be joined using dedicated couplers, allowing the creation of multi-section windows complete with an integrated drip bar between modules for authentic detailing.
- Typical sightlines: 59mm
- Frame depth: 47mm
Versatile Configurations
Whether you need fixed lights, side-hung casements, top-hung vents, tilt-and-turn options, or pivot windows, Alitherm Heritage offers versatile styles to suit your project needs.
Thermally Efficient Aluminium
Advanced polyamide thermal break technology significantly reduces heat transfer. When combined with quality sealed units, Alitherm Heritage windows can achieve a U-value of approximately 1.5 W/m²K and a Window Energy Rating (WER) B, meeting Part L of the Building Regulations.
Perfect for Restoration & Renovation Projects
From classic period homes to contemporary interpretations of heritage design, Alitherm Heritage windows preserve character while delivering modern functionality.
Slim sightlines
Period aesthetics
Choose any RAL colour
Features
- Authentic period aesthetics with contemporary performance
- Outstanding thermal efficiency and weather resistance
- Strong, low-maintenance aluminium durability
- Complete design flexibility and customisation
| Feature | Details |
| Material | Aluminium with polyamide thermal break |
| U-Value | 1.5 W/m²K (with appropriate glazing) |
| Energy Rating | WER B |
| Frame Depth | 47 mm |
| Glazing Options | 24–36 mm (double or triple glazed) |
| Testing Standards | BS 6375 Part 1, PAS 24 (selected) |
| Colour Finishes | Single or dual, including textured & anodised options |
Get a quote for an Alitherm Heritage
Get a quote for the Alitherm Heritage windows for your next trade project.
Alitherm 400
Alitherm 800