The Perfect Blend of Tradition and Innovation

The Alitherm Heritage window and door system offers the ideal solution for renovation and refurbishment projects where aesthetics, planning regulations, and performance need to work in harmony. Designed specifically for heritage applications, including listed buildings, steel window replacements, and period-style refurbishments, this range mimics the slim sightlines and detailing of traditional metal windows.

Each profile is manufactured using Smart’s advanced polyamide thermal break technology, significantly improving thermal efficiency and meeting the rigorous demands of Document L. Alitherm Heritage can be configured as a series of horizontal modules with specially designed drip bars, allowing for authentic multi-part window arrangements.

Available in a wide range of colours and finishes, including textured, metallic, dual-colour, and Smart’s Alchemy anodised effect, the Heritage system offers outstanding design flexibility. Despite its traditional appearance, it provides high security, excellent weather performance, and modern-day functionality — ideal for both residential and commercial heritage applications.

Key Features And Benefits

• Authentic Steel-Look Aesthetic – Perfect for listed buildings and traditional architecture

• Horizontal Module Design – Create multi-part windows with classic styling

• Advanced Thermal Breaks – Smart polyamide technology enhances insulation

• Fully Compliant – Meets the requirements of Document L of Building Regulations

• Customisable Finishes – Choose from metallic, dual colour, textured, or anodised effects

• Slim Sightlines – Elegant and subtle frame design to replicate steel

• High Security – Compatible with modern locking systems for peace of mind

• Weather Resistant – Excellent protection from the elements

• Perfect for Renovations – Ideal for heritage refurbishments and conservation areas