As sustainability pressures build across construction, Spencer Melia, sales manager at Aluminium Shapes, explains why the material stage is becoming critical for manufacturers.

For the aluminium sector, the conversation is shifting. Performance and design still matter, but carbon is rapidly becoming the issue everyone is talking about.

Across the fenestration supply chain, pressure is growing to reduce the embodied carbon of the materials used in windows, doors and façade systems. That shift is prompting a closer look at the aluminium billet itself – and how it is produced.

For system companies, fabricators and specifiers, the challenge is clear. Sustainability targets are tightening and project teams are increasingly asking for embodied carbon data on the materials used in façade and fenestration systems.

But while many businesses want to reduce the carbon footprint of the products they supply, doing so in practice isn’t always straightforward, particularly when aluminium sourcing sits several steps back in the supply chain.

Ali4 focuses on reducing carbon at the very start of the aluminium supply chain.

At Aluminium Shapes, we specialise in bespoke aluminium extrusions and machined components, supporting customers across sectors including fenestration. Often working behind the scenes, we produce the profiles and specialist aluminium parts that help bring window, door and façade systems to life.

Increasingly, those components are expected to meet environmental as well as technical requirements.

Ali4 was developed to help address that challenge by reducing the carbon impact of aluminium at the very start of the supply chain.

Since January this year, all aluminium supplied by Aluminium Shapes has been extruded using our new Ali4 low-carbon billet. This delivers a carbon footprint of no more than 4kg CO₂e per kilo of aluminium produced. By comparison, the global average carbon footprint for aluminium billet is approximately 14.8kg CO₂e per kilo.

For manufacturers and system companies looking to lower the embodied carbon of their products, that difference is significant.

Material choice plays a major role in determining the environmental footprint of finished systems. However, lower-carbon aluminium options have sometimes been viewed as difficult to source or as requiring compromises around performance, availability or supply chain reliability.

Ali4 has been designed to remove those concerns.

The billet itself is a premium recycled aluminium product produced using just 30% prime raw materials, with the remainder coming from recycled aluminium, including post-consumer end-of-life material. Crucially, it delivers the same strength, durability and fabrication characteristics expected from high-quality aluminium.

Customers can reduce the carbon footprint of their aluminium components without changing how they design, specify or manufacture their products.

That practicality matters in a sector where efficiency and reliability are essential. Fabricators and system companies need confidence that the materials they use will perform consistently and arrive when they are needed.

At Aluminium Shapes, our model is built around supporting exactly that.

Operating from our facility in Corby, we provide a complete service covering bespoke aluminium extrusion, machining, finishing and packing. Managing these processes under one roof allows us to offer customers a responsive and flexible route from design to delivery.

By integrating Ali4 into that established model, customers can now source bespoke aluminium extrusions with a significantly lower carbon footprint while maintaining the service, quality and lead times they rely on. For many businesses, that balance between sustainability and practical supply is the key point.

The fenestration sector is already making progress when it comes to sustainability through improved thermal performance, recycling initiatives and more efficient manufacturing processes. But reducing carbon at the material stage represents another important step.

Ali4 gives system companies, manufacturers and product designers a straightforward way to support those ambitions by lowering the carbon impact of the aluminium components within their systems.

And importantly, it does so without compromising the qualities that have made aluminium such a successful material for modern fenestration.

As sustainability becomes a bigger factor in product specification, the industry will need solutions that reduce carbon without adding complexity or cost.

Ali4 is designed to do exactly that – making lower-carbon aluminium a practical choice for manufacturers across the fenestration sector.