Smart Alitherm Heritage Windows
The SMART Alitherm Heritage range offers a state-of-the-art aluminium thermal solution, ideal for both heritage and refurbishment projects. Designed as a contemporary alternative to traditional steel windows, it is perfect for situations requiring compatible materials and designs, such as replacing outdated steel windows or meeting planning regulations.

Key features
- Perfect for Heritage Projects: Ideal for restoring listed buildings or large-scale replica-refurbishment projects where planning constraints must be considered.
- Modular Design: Horizontal modules with couplers allow for a multi-part window system, featuring a specially designed drip bar for water protection.
- Thermal Efficiency: Incorporates Smart’s pioneering polyamide thermal break technology to create a barrier against cold air and retain warmth inside, significantly improving U Values.
- Compliant with Standards: Meets the strict requirements outlined in Document L 2010, ensuring energy efficiency and performance.

Why choose Smart Alitherm Heritage windows
Choose SMART Alitherm Heritage windows for a perfect blend of traditional style and modern performance, tailored to meet the unique demands of heritage and refurbishment projects.


I was impressed by the wide range of customization options for our new doors. The team was knowledgeable and guided me through the process effortlessly. The results exceeded my expectations!
Michael R.

The energy efficiency of the triple-glazed windows we purchased has made such a difference in our home. We’ve noticed lower energy bills and a much quieter living space. Thank you, 4 Moon Windows!
Sarah L.

4 Moon Windows transformed my home with their beautifully crafted windows and doors. The quality and attention to detail are exceptional. Their team was professional, and the installation was seamless. Highly recommend!