How Steel Windows & Doors Compare to Aluminium: A Complete Guide

When planning a glazing project, one of the most important decisions you’ll make is the choice of material. Steel and aluminium are the two leading options for contemporary and heritage projects alike — each with its own strengths, character, and considerations. At James Price Bespoke Glazing, we specialise in designing, manufacturing, and installing both, guiding you to the perfect solution for your home or development.

Here’s how they compare across the key factors: quality, durability, aesthetics, cost, installation, and heritage suitability.

Quality & Craftsmanship

Steel

Known for its strength and structural integrity, steel allows for ultra-slim sightlines without compromising performance.
Its rigidity means larger panes of glass can be supported with minimal framing — ideal for dramatic architectural statements.
Every steel system we install is hand-finished and precision-engineered, resulting in exceptional quality and longevity.

Aluminium

Aluminium frames are lighter and more flexible, which makes them a popular choice for residential projects and contemporary extensions.
They’re manufactured to high tolerances and offer excellent energy efficiency when thermally broken.
While still strong, aluminium cannot match the raw tensile strength of steel, especially for large-scale or industrial-style glazing.

Our Verdict: Steel wins on overall quality and strength, while aluminium offers excellent performance for standard window and door systems.

Durability & Longevity

Steel

Highly resistant to warping, weathering, and impact, steel frames can last for generations with minimal maintenance.
With proper treatment (such as galvanising and powder coating), they resist corrosion and remain stable even in harsh environments.
Perfect for exposed locations or heavy-use areas.

Aluminium

Naturally resistant to corrosion and rust, aluminium also offers great longevity, though it may require occasional refinishing to maintain its appearance.
Over decades, aluminium can be more prone to surface wear or slight expansion and contraction with temperature changes.

Our Verdict: Both materials are built to last, but steel has the edge in terms of structural resilience and life expectancy.

Aesthetics & Design Flexibility

Steel

Steel’s ultra-slim profiles and crisp, refined lines create a timeless, architectural look — often associated with heritage buildings, art deco homes, and industrial conversions.
It’s ideal for projects where aesthetics are paramount, offering a sense of craftsmanship and prestige that’s hard to match.
Steel frames can be customised with bespoke glazing bars, curved sections, and powder-coated finishes.

Aluminium

Aluminium’s versatility allows for a wide range of colours and finishes, and it can be formed into complex shapes more easily than steel.
It’s often chosen for minimalist, contemporary homes or when matching existing modern fenestration.
However, aluminium frames typically require slightly thicker profiles to achieve the same structural performance as steel.

Our Verdict: Steel delivers unmatched visual impact and elegance, while aluminium is more adaptable to a variety of design styles.

Cost Considerations

Steel

Steel windows and doors are generally more expensive due to the complexity of manufacturing, bespoke fabrication, and finishing.
However, they are a long-term investment — adding value, character, and architectural distinction to your property.

Aluminium

Aluminium is usually more budget-friendly and offers excellent performance for the price.
Its lightweight nature also means shorter fabrication times and lower transport costs.

Our Verdict: Aluminium wins on initial cost, but steel offers greater long-term value and prestige.

Installation & Project Process

At James Price Bespoke Glazing, we manage the entire process — from initial consultation and design through to precise installation.

Steel Installation

Requires expert handling due to the weight and bespoke nature of each frame.
Our team carefully measures, fabricates, and installs every unit to ensure a perfect fit and maximum performance.
Ideal for bespoke builds, heritage refurbishments, or custom architectural designs.

Aluminium Installation

Quicker to install thanks to lighter weight and modular systems.
A good choice for new builds, extensions, or projects with tight timelines.

Our Approach: Whether you choose steel or aluminium, our experienced installation team ensures a seamless process and outstanding results.

Heritage Buildings & Planning Permissions

If you’re working on a listed building, period property, or conservation area, material choice is crucial. Many planning authorities and heritage officers prefer steel windows and doors for their authentic, historically accurate appearance.

At James Price, we:

Work directly with local planning departments to meet heritage and conservation requirements.
Provide technical drawings, specification documents, and material samples to support your application.
Offer bespoke steel glazing systems that replicate traditional styles while meeting modern performance standards.

This collaborative approach ensures your project not only meets regulations but enhances the original character of the building.

Final Thoughts: Which Is Right for You?

Choose Steel if you want:

Unmatched strength and durability
Ultra-slim, elegant sightlines
Authentic heritage appearance
Long-term value and architectural impact

Choose Aluminium if you want:

Cost-effective, high-performance glazing
Lightweight, modern designs
Faster installation
Wide colour and finish options

At James Price Bespoke Glazing, we supply and install both premium steel and aluminium systems — tailored to your project’s design, budget, and regulatory needs. Whether you’re restoring a listed building or designing a striking contemporary home, our team ensures every detail is executed to perfection.