Designer Steel Frame Windows
Elevate your architecture with designer steel frame windows that combine industrial elegance with contemporary sophistication. These windows make a bold architectural statement while providing exceptional performance, slim sightlines, and the ability to support large glass panes that flood interiors with natural light.
From modern minimalist designs to heritage-style Crittall windows, our designer steel frames are the choice of architects, designers, and discerning homeowners seeking distinctive character and timeless appeal.
The Appeal of Steel Frame Windows
Steel frame windows have experienced a renaissance in modern architecture, prized for their ability to create stunning visual effects with minimal framework. The inherent strength of steel allows for exceptionally slim profiles that would be impossible with other materials, resulting in windows that seem to disappear, leaving only expanses of glass.
This aesthetic is particularly popular in loft conversions, industrial-style homes, contemporary extensions, and commercial spaces where the architectural vision demands clean lines and maximum transparency. The black or dark frames create dramatic contrast against walls and provide definition without visual weight.
Beyond aesthetics, steel frames offer practical advantages including exceptional durability, the ability to support very large glass panels, resistance to warping or bowing, and a lifespan measured in decades. When properly maintained, steel windows can last 60 years or more while maintaining their appearance and performance.
Design Possibilities
- Slim Profiles:
Create minimal sightlines for maximum glass and unobstructed views.
- Large Format Glass:
Support oversized glass panels up to 3m x 3m or larger.
- Custom Configurations:
Design fixed, opening, pivot, or sliding sections to suit your needs.
- Color Options:
Choose from classic black, white, bronze, or any custom RAL color.
- Architectural Details:
Incorporate glazing bars, transoms, and mullions for traditional or modern looks.
Designer Steel Window Collection

Slim Profile Designer Steel Window
$799.99
Contemporary slim steel frame window with minimal sightlines, maximizing glass area for a modern aesthetic and expansive views.
Key Features:
- Ultra-slim steel profiles
- Maximum glass-to-frame ratio
- Contemporary minimalist design
- Custom RAL color options
- Precision engineering
Specifications:
- material:
- Hot-rolled steel or cold-rolled steel
- frame Thickness:
- 25mm-40mm slim profile
- glazing:
- Large format glass up to 20mm thick
- finish:
- Premium powder coating or factory-applied paint
- warranty:
- 10 years frame and finish

Heritage Style Steel Window
$949.99
Classic Crittall-style steel window with traditional divided lights, perfect for period properties and heritage restoration projects.
Key Features:
- Authentic period design
- Traditional glazing bars
- Hot-dip galvanized steel
- Suitable for conservation areas
- Historically accurate detailing
Specifications:
- material:
- Hot-rolled steel sections
- frame Thickness:
- Traditional 25mm x 50mm profiles
- glazing:
- Single or double glazed heritage glass
- finish:
- Factory paint in traditional colors
- warranty:
- 12 years comprehensive

Architectural Custom Steel Window
$1299.99
Bespoke architectural steel window system designed to your exact specifications, ideal for unique projects and signature designs.
Key Features:
- Fully customizable design
- Complex geometries possible
- Integrated shading systems
- Thermally broken options available
- Engineered to project specifications
Specifications:
- material:
- Structural steel profiles
- frame Thickness:
- Custom as per design
- glazing:
- Any specification available
- finish:
- Custom colors and finishes
- warranty:
- 15 years design-dependent
Popular Design Styles
Industrial Loft
Black steel frames with large glass panels create the signature industrial aesthetic.
Heritage
Traditional Crittall-style windows with period-appropriate glazing bars and details.
Contemporary
Ultra-slim profiles with minimal sightlines for modern architectural projects.
Create Your Signature Look with Designer Steel Windows
Consult with our design specialists to bring your architectural vision to life.