The Zen W20 Solid Steel Profile Window system is defined by precision, restraint, and exceptionally fine steel sightlines. Designed for applications where minimal visual interruption is a priority, W20 is our narrowest steel window profile overall, making it ideal for feature windows, internal glazing, and architectural settings where lightness and detail are paramount.
Manufactured from solid steel, the W20 profile delivers a crisp and elegant finish that suits refined residential interiors, boutique commercial spaces, and carefully detailed architectural projects. Its slim proportions maximise glazing while allowing the steel frame to remain visually subtle, creating windows that feel highly resolved and timeless in their appearance.
W20 is particularly effective for internal steel windows, fixed glazing, and feature openings where transparency, proportion, and clean detailing matter more than large-span structural capacity. The profile’s narrow face dimensions make it well suited to contemporary interiors as well as more classic or heritage-inspired spaces seeking a delicate steel aesthetic.
While visually minimal, W20 retains the durability and permanence of solid steel construction. The result is a profile that delivers understated strength with a distinctly premium architectural finish. For projects seeking slim steel windows with refined detailing and elegant proportions, W20 is one of the most sophisticated options within the Zen range.



