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Steel Windows

Crittall-style steel windows and screens for industrial and heritage projects

Coverage: UK-wide
Warranty: 10 years insurance-backed
Accreditation: FENSA registered

Steel windows — often called Crittall-style — combine the slimmest possible sightlines with industrial-aesthetic appeal. Originally used in 1920s and 30s art deco and modernist buildings, they're now back in demand for kitchen extensions, internal screens, heritage refurbishments and high-end residential projects. S&K Glazing supplies and installs both authentic hot-rolled steel systems (W20, MW40) and slim aluminium look-alikes.

Why choose our steel windows

  • Slimmest sightlines available — frames just 25mm wide on aluminium systems, 20mm on steel
  • Authentic industrial and art deco aesthetic
  • Available as windows, doors, internal screens and curtain wall infills
  • Powder-coated black or any RAL colour
  • Thermally-broken options available for external use
Project gallery

Steel Windows in action

A selection of recent steel windows installations across the UK.

Our process

From survey to installation in 4 steps

01

Design consultation

We help you choose between authentic hot-rolled steel (heaviest, most authentic) and modern aluminium look-alikes (lighter, thermally-broken, more affordable).

02

Custom manufacture

Steel sections cut and welded by hand, or aluminium profiles machine-cut. Lead times 6-8 weeks for steel, 3-4 weeks for aluminium.

03

Specialist install

Steel windows are heavy and require precision tolerances. Our team has 10+ years experience with W20 and MW40 systems.

04

Glazing & ironmongery

We finish with handles, hinges and stays in matching black, polished steel or antique brass — period-appropriate to your project.

FAQs

Steel Windows questions, answered

Real steel windows use hot-rolled W20 or MW40 profiles — heavy, slim, authentic. Aluminium look-alikes are lighter, thermally-broken (better for energy), and 30-40% cheaper but visually similar from 2m+ away.
Modern thermally-broken aluminium look-alike systems achieve U-values around 1.4 W/m²K. Authentic single-glazed steel is poorly insulating and best used for internal screens or heritage projects where appearance dominates.
Yes — this is one of our most popular applications. Steel-look internal screens between kitchen and dining room, hallway and lounge, or as ensuite screens. We supply both glazed and partially-glazed versions.
Steel windows from the 1920s and 30s are still serviceable today — 100+ year lifespans are common. Modern hot-dipped galvanised and powder-coated steel windows are guaranteed for 25 years against corrosion.
Steel frames are stronger than uPVC or aluminium and very difficult to force. We fit multi-point locking and toughened or laminated glass as standard for ground-floor installations.
Local coverage

Steel Windows across the UK

We install steel windows from our Birmingham facility to every corner of the UK. Find your area below.

Contact us

Speak to our glazing team

Free survey, fixed-price quotes, no pressure sales. Call us, message on WhatsApp, or fill in the form — we typically respond within an hour during working days.

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Head office
Unit 1-4, Hembs Crescent, Great Barr
Birmingham B43 5DG

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