Which is better, aluminum or steel windows?

Comparison of aluminum and steel windows for residential designs.
Aluminum vs. Steel Windows

As someone who has worked with various window materials, I’ve often heard clients ask, “Which is better—aluminum or steel windows?” It’s a tough question because both materials have their strengths and weaknesses.

Aluminum windows1 are generally better for modern applications due to their lightweight nature, corrosion resistance, and design flexibility, while steel windows are ideal for industrial or historic aesthetics due to their strength and slim profiles.

To make an informed decision, let’s explore the details of each material and how they compare.

Why is it better to make window frames out of aluminium and not steel?

Aluminum is better for window frames2 because it is lightweight, resistant to corrosion, easy to customize, and more affordable compared to steel.

Benefits of Aluminum Window Frames

Feature Aluminum Steel
Weight Lightweight Heavy
Corrosion Resistance High Low (requires treatment)
Finish Options Wide variety Limited
Cost Affordable Expensive

Outdoor display of a window frame model with industrial surroundings.
Industrial Window Display

What are the disadvantages of aluminium windows?

The main disadvantages of aluminum windows3 include lower thermal performance without a thermal break, susceptibility to dents, and a higher initial cost compared to vinyl.

Drawbacks of Aluminum Windows

Disadvantage Impact Solution
Heat Transfer Higher energy costs Use thermal break frames
Denting Cosmetic damage Opt for thicker profiles
Initial Cost Budget concerns Consider long-term savings

What are the disadvantages of a steel framed window?

The disadvantages of steel-framed windows4 include their susceptibility to rust, high cost, and heavy weight, which can complicate installation and maintenance.

Drawbacks of Steel Windows

Disadvantage Impact Solution
Rust and Corrosion Reduced lifespan Use galvanization/coatings
High Weight Difficult installation Professional handling
High Cost Budget concerns Consider alternatives
Energy Loss Increased energy bills Combine with insulated glass

Technician replacing a rusted window frame with a modern design.
Window Frame Replacement

What is the difference between steel and aluminum windows?

Steel windows are stronger and offer slimmer sightlines5, while aluminum windows are lighter, more versatile, and resistant to corrosion.

Side-by-Side Comparison

Feature Steel Aluminum
Strength Very high Moderate
Weight Heavy Lightweight
Corrosion Resistance Low (requires treatment) High
Thermal Efficiency Low Moderate to high (with thermal breaks)
Aesthetic Appeal Industrial, historic Modern, sleek
Cost High Moderate

Conclusion

The choice between aluminum and steel windows6 depends on your project’s priorities. Aluminum windows offer lightweight durability, corrosion resistance, and modern aesthetics, making them ideal for most applications. Steel windows provide unmatched strength and a classic, industrial appeal, albeit with higher costs and maintenance.


  1. Benefits of aluminum windows for modern applications.  

  2. Reasons why aluminum is preferred over steel for window frames.  

  3. Drawbacks and limitations of aluminum windows.  

  4. Challenges and drawbacks of steel-framed windows.  

  5. Detailed comparison of steel and aluminum window features.  

  6. Summary of considerations for choosing between aluminum and steel windows.  

Hi there! I'm Thea, mom and hero to an adorable 5-year-old boy. By day, I'm a seasoned pro with 10 years in the window and door industry, going from sales to owning my own factory. Here to share what I've learned—let's grow together!
No-nonsense Guide for Newbies About Aluminum windows

No-nonsense Guide for Newbies

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