How Are Floating Staircases Installed?
- irontimbers
- May 11
- 4 min read
Floating staircases are designed to look clean and minimal, but behind that appearance is a very precise installation process. Proper planning, accurate measurements, and careful fabrication all play a major role in how the final staircase fits, performs, and looks inside the home.
While every project is different, most floating staircase installations follow the same general process from initial measurements to final assembly.
Step 1: Field measurements and planning
Every staircase starts with accurate field dimensions.
This includes:
Total floor-to-floor height
Stair opening dimensions
Finished floor thickness
Wall conditions
Structural attachment points
Layout details such as landings or turns
Because floating staircases are highly visible architectural features, small dimensional differences can have a major impact on fitment and alignment.
At Iron Timbers, approved shop drawings are created from these measurements before fabrication begins to ensure the staircase is built specifically for the space it is going into.
Step 2: Fabrication of the staircase system
Once measurements are verified, fabrication begins.
For a custom steel monostringer staircase, this typically includes:
Fabricating the steel stringer
Fabricating riser and tread support plates
Building railing systems
Preparing mounting plates and connection points
Finishing and powder coating steel components
Preparing hardwood treads
Unlike many kit-based systems that rely on adjustable parts assembled on-site, custom-fabricated systems are built around the exact layout of the home.
This allows for tighter fitment, cleaner lines, and a more integrated final appearance.
You can read more about the differences between floating staircase kit systems and custom-fabricated systems here.
Step 3: Preparing the home for installation
Before installation begins, the surrounding structure must be ready to support the staircase.
This may include:
Structural framing at attachment points
Blocking inside walls
Reinforced floor areas
Proper stair opening dimensions
Finished wall preparation
Floating staircases rely heavily on structural support behind the finished surfaces, which is why coordination during construction is important.
In many cases, the staircase is installed after drywall and flooring are completed to help achieve a cleaner final fit.
Step 4: Installing the steel monostringer
The steel monostringer is typically the first major component installed.
The stringer is carefully positioned and attached at:
The upper floor connection
The lower floor or slab connection
Any intermediate support locations if required
Temporary supports or lifting equipment are often used during positioning due to the weight and size of the steel components.
Once installed, the stringer becomes the structural backbone of the staircase.
Step 5: Installing the riser and tread support plates
After the steel monostringer is secured, the riser and tread support plates are installed onto the staircase structure.
These pre-fabricated components are designed specifically for the staircase layout and are installed to:
Support the hardwood treads
Maintain consistent stair geometry and spacing
Establish the finished staircase geometry
Prepare the system for tread installation
Because these components are fabricated specifically for the staircase system, they help streamline installation while maintaining consistent alignment throughout the staircase.
Step 6: Installing the treads
After the riser/tread plates are secured, the hardwood treads are installed.
Treads are often installed individually and aligned carefully to ensure:
Consistent spacing
Proper overhangs
Square alignment
Clean transitions at walls and landings
At Iron Timbers, tread mounting holes are typically finalized during installation rather than fully predrilled. This allows installers to account for minor field variations and helps achieve a more precise final fit.
Step 7: Installing the railing system
The railing system is one of the final major installation steps.
Depending on the design, railings may arrive:
As larger pre-fabricated sections
As welded assemblies
Or as multiple components designed specifically for the staircase layout
Custom-fabricated railing systems are designed around the staircase itself rather than adjusted to fit later. This helps eliminate unnecessary modifications during installation and creates a cleaner finished result.
Proper railing installation is also critical for safety and code compliance.
If you want to learn more about how floating staircases are engineered for safety, you can read our guide on floating staircase safety.
How long does installation take?
Installation timelines vary depending on:
Staircase complexity
Site conditions
Number of landings or turns
Railing design
Finish work coordination
Simple straight staircases may install relatively quickly, while larger custom systems can require multiple days of installation and adjustment.
The more integrated and custom the system is, the more coordination and precision are typically involved.
The real difference is preparation
Most of the work involved in a floating staircase happens before installation day ever begins.
Accurate measurements, engineering, fabrication, and planning are what allow the staircase to install properly and perform long-term.
That preparation is often the difference between:
A staircase that feels integrated into the home
And a system that feels adapted to fit afterward
Who typically installs floating staircases?
Most floating staircase systems are installed by qualified contractors using approved shop drawings, installation documentation, and coordinated field measurements. Proper planning before installation is critical to achieving the intended fit, alignment, and final appearance. At Iron Timbers, installation documentation and approved shop drawings are provided to help contractors properly assemble the system.
See what floating staircases realistically cost
If you're planning a floating staircase project and want to better understand pricing, materials, and design factors, read our full floating staircase pricing guide based on real 2026 projects.
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