Creating durable, low-maintenance outdoor spaces in exposed environments is easier than ever with TreadTech aluminium subframes and adjustable pedestal systems. In this recent Wellington project, BiForm Wellington installed two new deck areas using the TreadTech system, delivering strong performance and a clean finish on challenging ground conditions.
Project Overview
Location: Wellington, NZ
Installer: BiForm Wellington
Deck Area 1: 2.0m x 6.5m deck at 150–200mm above ground level
Deck Area 2: 3.2m x 6.5m deck at 300–350mm above ground level
System: TreadTech Aluminium Subframe + Adjustable Pedestals
Decking: BiForm composite decking (style/colour as per project spec)
Why TreadTech Was the Right Fit
With varying site elevations and minimal clearance available in some areas, the TreadTech deck system provided the ideal solution for both low-profile and mid-height decking. Unlike timber framing, TreadTech’s non-combustible, rot-proof aluminium is stable over time and requires minimal maintenance - even in Wellington’s changeable weather.
Adjustable pedestals made it easy to:
Level both deck zones with precision
Allow airflow and drainage under the structure
Avoid direct ground contact
Achieve a clean finish under composite boards
Engineered for Performance
The TreadTech aluminium framing system is pre-engineered to meet NZ Building Code requirements, giving both specifiers and installers peace of mind. Designed with ease of installation in mind, it uses standardised connectors and CNC-machined profiles for fast, accurate assembly.
It’s an ideal choice for:
Low to mid-height decks
Coastal or damp environments
Projects requiring code compliance and durability
Builders and homeowners who want long-term performance
