Steel Windows in Kent: Design Options, Planning Advice and Coastal Considerations

• January 8, 2026
• General

Steel windows are experiencing a remarkable resurgence in contemporary architecture. Once synonymous with industrial buildings and factories, these elegant window frames are now a popular choice for modern homes, commercial buildings, and new build projects across the UK.

Their slim sightlines, durability, and ability to flood interiors with natural light make them the perfect style choice for architects, designers, and homeowners seeking a blend of form and function.

At Lightfoot Windows, we’ve witnessed this shift firsthand.

As the UK’s largest Crittall specialist, we’re seeing increasing demand for steel windows in Kent, London, and beyond. This blog explores why steel windows have become such a sought-after feature in modern architecture.

The aesthetic appeal of steel windows

One of the most compelling reasons for the popularity of steel windows in contemporary design is their distinctive aesthetic appeal. The slim profiles and clean lines create a minimalist look that complements modern architectural styles whilst maintaining a connection to the Art Deco era.

Key aesthetic benefits include:

• Maximised glazing area with minimal frame
• Expansive panes of glass for uninterrupted views
• Versatile colour options beyond traditional black, including custom RAL finishes
• Both internal and external systems

Steel window frames offer a level of visual refinement that other window materials simply cannot match. Their inherent strength allows for much thinner profiles than aluminium windows or UPVC alternatives, resulting in more glass and less frame.

For homeowners in London and Kent, where maximising space and light is often a priority, steel windows offer a practical solution. They work particularly well in new build properties where architects can design around the strengths of the material from the outset.

Durability and longevity

When considering new windows, durability is a critical factor. Steel windows excel in this area, offering exceptional longevity that makes them a worthwhile investment despite their higher initial cost compared to UPVC options.

Durability advantages:

• Steel frames are incredibly robust and resistant to warping
• Modern powder coating techniques virtually eliminate rust and corrosion concerns
• Minimal maintenance requirements – no regular painting or staining like timber
• Excellent performance in harsh weather conditions and extreme weather conditions
• Superior resistance to attempted break-ins, providing maximum security against intruders

Original steel windows installed decades ago are often still functioning perfectly, testament to the material’s longevity.

Energy efficiency and thermal performance

A common misconception is that steel windows compromise on energy efficiency. Modern steel window manufacturers have addressed this concern through innovative technology, which significantly reduces heat transfer through the frames.

Energy efficiency features:

• Innovative construction to minimise heat loss
• Compatible with high-performance double glazing
• Improved thermal efficiency compared to older steel window ranges
• Contributes to overall building energy performance
• Reduces heating costs and environmental impact

At Lightfoot Windows, our Crittall steel windows are ideal for Kent homes, and demonstrate that you don’t need to sacrifice thermal efficiency for aesthetic appeal. The right choice of glazing specification combined with quality steel frames delivers both beauty and performance.

In particular, the Crittall W20 TE range offers excellent thermal performance. This range achieves the thermal gradient equivalent of a thermally broken steel section while maintaining the traditional aesthetic of steel.

Versatility across architectural styles

Steel windows aren’t just for ultra-modern homes. Their versatility allows them to complement a variety of styles, from industrial conversions to traditional properties requiring sensitive updates to old windows.

Style versatility:

• Works with contemporary minimalist designs
• Suits industrial-style conversions and loft spaces
• Appropriate for period properties when replacing original steel windows
• Available in numerous types of windows including casement, bay windows, and French windows
• Multiple configurations to suit specific design preferences

External frames can be colour-matched to existing architectural features, whilst internal frames can create distinctive room divisions without blocking light. This adaptability makes steel windows a popular choice across diverse project types.

Addressing common concerns

Coastal environments

Consideration is needed in coastal environments to protect steel windows from the corrosive effects of salt water. The good news is that Crittall frames can be marine durability powder coated (which includes a two coat primer & Enhanced Durability top coat) to ensure longevity.

Rust and corrosion

Modern steel windows feature protective coatings that prevent rust. Hot-dip galvanising and high quality powder coating mean corrosion is no longer a concern with properly specified products.

Higher initial cost

Yes, steel windows typically have a higher initial cost than UPVC alternatives. However, their exceptional durability, minimal maintenance, and timeless appeal mean they often prove more cost-effective over their lifetime.

Installation expertise

Steel windows require specialist installers who understand the material’s unique properties. At Lightfoot Windows, our team brings decades of experience to every project, ensuring perfect installation and peace of mind.

Why choose Lightfoot Windows?

As the UK’s premier Crittall specialist since 1935, Lightfoot Windows brings unmatched expertise to steel window installations. We offer:

• The complete range of authentic Crittall steel windows and steel doors
• Expert guidance on window ranges suitable for your project
• FENSA accreditation and Made in Britain certification
• Support from initial free consultation through to completion
• Showrooms in London where you can see our products firsthand

Whether you’re an architect specifying materials for a commercial project, a designer working on a residential renovation, or a homeowner planning new windows for your property, we provide the expertise and high quality products you need.

Transform your Kent project with steel windows

Steel windows represent where modern architecture is heading – towards designs that maximise natural light, minimise visual clutter, and stand the test of time. They offer the perfect combination of aesthetic appeal, durability, and practical performance that today’s discerning homeowners and designers demand.

If you’re considering steel windows in Kent, London, or anywhere across the UK, we’d love to discuss your project. Our team can help you explore the various types of windows available, advise on the right choice for your specific needs, and provide a detailed quotation.

Get in touch with Lightfoot Windows today:

– Complete our online contact form

– Call us on 020 8662 9090

– Email general@lightfootwindows.co.uk

Want a quick estimate on new Crittall windows? Simply visit our ‘Get An Estimate’ page and fill out the required information. One of our experts will get back to you within 48 hours with a no-obligation quote.