The Fluid Steel Window/Door system combines timeless visual appeal with cutting-edge thermal performance. Built around ultra-slim steel profiles, it offers a refined architectural solution for projects that demand elegance, durability, and versatility. Suitable for both heritage restorations and contemporary design, Fluid Steel delivers expansive glazed areas, minimalist sightlines, and enduring material quality. With a wide range of opening types and configurations, it provides design freedom without compromising performance.
Fluid Steel offers a choice of powder-coated, stainless, or Corten finishes with multiple glazing bead options for heritage or contemporary projects. Its slim profiles support unit thicknesses up to 47mm, with performance tested to the highest standards.
- CE marking up to 1570 × 1570 mm
- Galvannealed steels with a zinc-iron layer (ZF)
- Slim profiles
- Unit thicknesses from 10 to 47 mm
- Powder coated (RAL)
- Stainless steel (1.4401)
- Corten steel options
- Glazing beads (right-angled, bevelled, scotia, flat)
- Uw value from 0.8 W/m2K
- Acoustic 45 dB
- Mechanical strength tested (EN 13115)
- Impact resistance (EN 13049)
- Multi-point window locking
- High-traffic durability class 7 (500,000 cycles)
ZF 100 galvannealed coatings provide enhanced corrosion resistance and cleaner welds with reduced smoke and sparking—now standard across all Fluid Steel profiles.
Surface finish Z 275
Surface finish ZF 100
Powder Coated
Stainless Steel
Corten
Fluid Steel is designed to bring slender steel-framed glazing into a new architectural era—preserving the character of traditional detailing while delivering modern structural and environmental performance. It lends itself equally well to sensitive renovations and bold contemporary expressions.
Industrial Heritage, Modern Context
Originally developed to replicate traditional steel windows, Fluid Steel has evolved into a sophisticated glazing system suited to both restoration and new build contexts. Its 25–40mm sightlines allow light to pour into interiors while maintaining the proportions and detail of historic fenestration. The system’s use of steel, stainless steel, or Corten profiles enables architects to specify by both aesthetic and environmental condition.
Glazed Versatility
Fluid Steel offers inward and outward opening options for windows and doors—available as single or double vents—with vertical and horizontal pivot mechanisms, projected top-hung variants, and fixed glazing formats. Narrow face widths and large unit sizes enable elegant façade compositions, while the integrated weatherstrip groove and welded frame construction ensure both form and function align seamlessly.
Side-hung
Inward opening
Single-vent
Side-hung
Inward opening
Double-vent
Side-hung
Outward opening
Single-vent
Side-hung
Outward opening
Double-vent
Bottom-hung
Inward opening
Top-hung
Outward opening
Projected top-hung
Outward opening
Horizontal pivot
Inward/outward opening
Beneath its minimal appearance, Fluid Steel is a highly engineered system. It balances strength, thermal performance, and acoustic control within slim profiles, delivering a glazing solution that exceeds modern expectations for comfort, security, and longevity.
Performance Built In
Behind the refined profile is a robust, precision-engineered system. Welded steel frames with composite thermal breaks and high-performance glazing options achieve Uw values from 0.8 W/m²K and acoustic insulation up to 41dB. The system meets EN 14351-1 CE marking, EN 14024 profile standards, and EN 1627 RC2 security classifications. Door variants are available with thresholds or flush designs, and all components are tested for mechanical strength and impact resistance.
Strength in Detail
With vent weights up to 150kg and sizes up to 3000 × 2500mm for sliding units, Fluid Steel handles scale effortlessly. Leaf and frame construction leverages welded steel profiles paired with glass fibre-reinforced plastics, creating long-lasting stability and improved insulation. Wet and dry glazing methods ensure versatility during fabrication, while optional multi-point locking enhances usability and security.
Every detail of the Fluid Steel system has been considered to deliver visual clarity and architectural rigour. The design language is defined by fine sightlines, expressive materiality, and adaptable configuration options that enhance both contemporary and classical settings.
Timeless Minimalism
Whether powder coated, anodised, or finished in weathered Corten, each installation makes a subtle yet confident architectural statement. Mortice or multi-point locking, flush or expressed details, and a variety of handle options complete the system’s bespoke design flexibility.
Adaptable Configurations
From tall slender doors to wide multi-pane fixed glazing, Fluid Steel adapts to the specific demands of any space. Designed to work across scales and typologies, it can be specified to preserve existing character or deliver striking contrasts in modern additions.
