Cantilever Staircases
Cantilever staircases—an architectural speciality of Siller
Cantilever staircases rank among the most distinctive and technically exacting solutions in modern staircase design—and are also a particular speciality of Siller. They express the utmost restraint, architectural clarity and striking visual lightness.
A cantilever staircase is defined by its apparently floating construction, in which individual treads project from the wall with no visible supporting structure. The result is a minimalist appearance that directs attention entirely towards material, form and spatial effect. In premium interiors in particular, timber treads with crisp rectangular geometry are frequently used, often intentionally pared back and free from visible connections.
Siller extends this principle through a wealth of design and technical possibilities. Cantilever staircases can also be realised in concrete—with exceptionally slender sections of just 60 mm at widths of up to 995 mm, or in more substantial designs up to 1500 mm wide with correspondingly greater material depths. The addition of marble dust gives the concrete an elegant, stone-like character and allows it to integrate harmoniously into a variety of architectural colour and material schemes.
To create a particularly dynamic spatial effect, cantilever treads can also be formed with a taper or geometric narrowing. Their soffits are precisely bevelled, lending the structure a further sense of visual lightness. This formal language also lends itself to turning or organically shaped flights.
The material palette ranges from fine timbers to concrete and glass, as well as modern materials such as acrylic and Corian. Each version is individually tailored to the architectural context and executed with technical precision.
The result is a cantilever staircase that is not only structurally sophisticated, but reads as restrained, floating architecture within the space—an interplay of engineering expertise, material aesthetics and design precision.
