Blog – Aluminium Heritage Windows: A Cheaper Alternative to Crittall®* Steel

For decades, Crittall®* steel windows have been the benchmark for slimline, industrial-style glazing. Their iconic look is instantly recognisable in loft conversions, period homes, and modern architectural projects.

But there’s one drawback: cost. Genuine steel windows often come with a hefty price tag and longer lead times, making them out of reach for many homeowners and developers.

That’s where aluminium heritage windows step in.

Aluminium heritage windows, such as the Alitherm Heritage system, are designed to replicate the slim sightlines and putty-line detailing of traditional steel. From the outside, the difference is almost impossible to spot — especially once installed in period properties or industrial-inspired renovations.

👉 In short: you get the Crittall®* style without the Crittall®* cost.

💷 Cost Savings Without Compromise

• Steel windows are bespoke, labour-intensive to fabricate, and carry a premium price.
• Aluminium heritage windows are more affordable to manufacture and install, giving you the same aesthetic at a fraction of the cost.

For developers, this means projects stay on budget without sacrificing the design intent. For homeowners, it means the dream “steel-look” finish is suddenly achievable.

🌡 Energy Efficiency & Performance

While steel is undeniably strong, it can struggle to meet today’s Part L building regulations on energy performance.

Modern aluminium heritage windows incorporate polyamide thermal breaks and double or triple glazing, offering significantly better U-values than traditional steel. This means:

• Lower heating bills
• A warmer, more comfortable home
• Compliance with current regulations

🔒 Security & Durability

• Aluminium heritage windows can be tested to PAS24 security standards and fitted with modern multi-point locking systems.
• Unlike steel, aluminium is naturally resistant to corrosion and requires minimal maintenance — no need for regular repainting or specialist treatments.

🎨 Colour & Customisation

Steel windows usually come in limited finishes. Aluminium, however, can be powder-coated in any RAL colour, including dual colour (different inside and out). This makes it easier to match interiors, exteriors, or planning requirements.

⚖️ The Verdict: Smarter Value

• If you want heritage authenticity at any cost, Crittall®* remains the original choice.
• If you want the same look, better efficiency, faster lead times, and lower costs, aluminium heritage windows are the clear winner.

For many projects, aluminium is the practical, cost-effective alternative that still delivers the architectural style everyone loves.

*Crittall® is a registered trade mark of Crittall Windows Limited which is unconnected to Total Aluminium Solutions.