Adelaide Marble Floating Staircase, Windows & Cabinetry
Project DBM25050806 · Adelaide, Australia · New-Build Home
A New-Build Adelaide Home: Marble Floating Staircase, Aluminium Windows & Custom Cabinetry
For Joey’s new build near Adelaide, we made the staircase, the windows and doors, and the cabinetry in one workshop — then shipped it all ready to fit.
By Double Building Materials — the staircase & railing manufacturer in Guangdong, China that made and shipped this project’s staircase, aluminium windows and doors, and cabinetry. Written from our own shop drawings and workshop records. Published June 2026.
Setting the marble treads against the stone feature wall during fit-out — Adelaide, South Australia.
The Project at a Glance
Double Building Materials fitted out this Adelaide new-build across five lines: a marble floating staircase and balustrade, aluminium windows and doors, an entry door, and custom cabinetry. We drew, trial-assembled and crated every part in our Guangdong workshop, then shipped it to South Australia for the client’s builder to install.
The Homeowner
Joey was building a new family home on the open outskirts of Adelaide. The plans leaned on wide glazing to pull in the South Australian light. He wanted the main interior elements — the staircase, the windows and doors, and the cabinetry — to come from one maker. That way the finishes would match and the parts would land on a single, predictable schedule. He worked with us directly, from China to site.
The Challenge
A floating marble staircase is heavy and unforgiving. Each tread is solid stone, and the design called for the steps to reach out from a stone wall with no support in sight. That weight has to travel into a hidden steel frame, built into the wall before the cladding even goes on. Set the geometry out wrong and the stone will not sit flat.
The home also needed its windows, doors and cabinetry at the same standard, on the same timeline. That meant five product lines, one site, and one shipping window — across an ocean.
And the stair is the first thing you see. In an open-plan build it reads as the centrepiece from the living area, the entry, and the floor above. One step sitting proud, or one tread dipping, would show from every angle.
The Brief
The brief was simple to say and hard to build. Joey wanted a marble staircase that looked like it floated — solid stone steps reaching from the wall, with a slim balustrade that stayed out of the view. He wanted the aluminium windows and doors in one dark frame, so the glazing would read as clean black lines against a white interior. And he wanted the cabinetry to speak the same quiet, modern language. One look, carried across the whole home.
Why These Materials
The marble floating staircase
A floating staircase hides its support, so each step looks like it grows from the wall. A steel stringer — the structural spine of the stair — carries the load and sits inside the stone wall, out of sight. The marble treads then fix to steel arms welded along that spine. Solid stone gives the steps real weight underfoot and a surface that ages well. It is also far less forgiving than timber, so we set the steel out to the millimetre.
Aluminium windows and doors
Aluminium frames stay slim and straight across big spans, which is what wide glazing needs. We powder-coat them in a dark finish, so the frame steps back and the glass does the talking. The same system runs through the windows, the sliding doors and the entry door, so every opening in the home matches.
A picture window framed in dark aluminium, on site during fit-out — Adelaide, South Australia.
Custom cabinetry
We drew the joinery from the same set as the rest of the fit-out. Flat, handle-light fronts in a light and a dark tone keep the look calm — so the marble stair stays the hero of the room.
Engineering & Code
The steel that carries the stone
The hidden stringer and the tread arms are the part nobody sees and the part that matters most. We size the steel for the dead weight of solid marble, plus the live load of people on the stairs. Then we weld it and check it before any stone goes on.
Code references for your certifier
Australia builds to the National Construction Code, with AS 1288 for glass and AS 1170 for structural loads. We prepare the shop drawings to reference these standards, so your certifier or engineer can review and sign off for approval. We make and document the parts; the local certification stays with your team.
From Drawing to Site
Drawing-First Coordination
Drawing-First Coordination means we draw the whole job before we cut anything. Joey sent his plans and references. We turned them into shop drawings for the stair steelwork, the marble setting-out, the window and door schedule, and the cabinetry — then sent them back for sign-off. Nothing reached the workshop floor until the client signed off the drawings.
Trial Assembly Before Packing
Trial Assembly Before Packing means we build it once, in our own workshop, before it ever ships. We stand the stair steel up, hang the tread arms, and check the rise and the line. We fit the windows and doors to their frames. Any problem gets fixed in Guangdong, where we have the tools — not on a site in South Australia.
Export-Ready Crating
Export-Ready Crating means we pack each line to survive the sea. Marble travels in braced timber crates with foam edges. Aluminium frames and glass ship in their own protected packs. We wrap and box the cabinetry. The hard part of a whole-home order is sequence: five lines have to arrive in the order the site needs them. So we label every crate to the install plan — the stair steel can go in early, the cabinetry can come last.
Double Building Materials makes, trial-assembles, crates and ships. On this project the client’s own contractor handled fitting on site. We supply assembly drawings and a step-by-step guide, and where local installation is available we can help you find a vetted installer.
The Reveal
At night the home reads as a row of warm rectangles in the dark. The black window frames hold the glass as clean lines, and the light from inside spills out across the stone. Behind the glazing, the marble stair climbs the feature wall like pale steps floating in shadow.
The black-framed glazing at night — warm light from inside spilling across the stone feature wall.
The stair does what Joey asked. From the living area, from the entry, and from the floor above, it reads as one quiet gesture. It is the part of the room a guest looks at first.
And it all matches. The dark frames, the marble and the cabinetry share one language, so the home feels finished rather than ordered in pieces. Because we drew and trial-built the parts together, they fit together too.
Specifications
| Project | Whole-home fit-out, new build |
| Staircase | Marble floating treads on hidden steel stringer |
| Balustrade | Slim balustrade, to architect’s drawing |
| Windows & doors | Aluminium framed, dark powder-coat; sliding + entry door |
| Cabinetry | Custom joinery, two-tone fronts |
| Glass | To AS 1288 (drawing reference) |
| Structure | Steel to AS 1170 loads (drawing reference) |
| Made in | DBM, Guangdong, China |
| Installed by | Client’s local builder |
Frequently Asked Questions
Can you make a whole home, not just the staircase?
Yes. On this project we made the staircase, the aluminium windows and doors, the entry door, and the cabinetry. One set of drawings keeps the finishes matched, and one shipment keeps the schedule simple.
Will it meet Australian building rules?
We prepare the shop drawings to reference the National Construction Code, AS 1288 for glass, and AS 1170 for loads. Your certifier or engineer then reviews and signs off for approval. We document the parts; the local sign-off stays with your team.
Who installs it when the crate arrives?
Your own builder or installer fits it on site, as Joey’s did. We send assembly drawings and a step-by-step guide, and where local installers are available we can help you find one.
Building or renovating, and want the major elements to match?
Send Us Your Plans for a Drawing Review →Related Products
Other Products
More from the same factory — drawn, trial-assembled and export-crated the same way.
