NCC 2025 Section J changes the game.
GreenGirt™ is ready.
Australia’s biggest commercial energy code upgrade in a generation is here. NCC 2025 Section J requires thermal bridging to be accounted for in every metal-framed commercial building — and basic thermal break strips won’t cut it. GreenGirt CMH™ insulated sub-framing systems deliver up to 98% Total R-Value retention across the full wall assembly. Proven across 4,500+ projects. Ready to specify now.
4,500+ Projects Worldwide · 98% Total R-Value Retention · 20+ Years of Proven Performance · EPD + Declare label · Green Star Ready · Engineered for NCC 2025 Section J
Steel sub-framing has a thermal bridging problem. National Construction Code 2025 Section J makes it impossible to ignore.
Under NCC 2025 Section J, metal-framed commercial buildings must account for thermal bridging in total R-Value calculations per AS/NZS 4859.2. A wall assembly that passed before may fall well short today. Basic thermal break strips meet the minimum R0.2 requirement, but they don’t eliminate the bridge through the cladding fixing itself.
External wall insulation is only as effective as the sub-framing that supports it. If your sub-framing thermally bridges through the insulation layer, you lose up to 60% of your total R-Value. That’s exactly what GreenGirt composite metal hybrid insulated sub-framing solves.
GreenGirt Max CMH™, GreenGirt Optima CMH™, GreenGirt XO™
Traditional steel zed angles and top hats
ISO 10211 verified by RDH Building Science
What is composite metal hybrid?
CMH technology combines the structural integrity of steel with the thermal insulative properties of fibre-reinforced polymer, delivering a sub-framing system that provides structural support without creating a thermal bridge through your building envelope.
Steel Structural Capacity
Full structural strength to support all cladding types, from lightweight fibre cement to heavy stone and precast panels.
Fibre-Reinforced Polymer Thermal Break
The FRP thermal break eliminates conductive heat transfer through the sub-frame, preserving up to 99% of your insulation’s R-Value.
No Thermal Bridging
Traditional steel zed angles and top hats conduct heat directly through the wall. GreenGirt CMH eliminates this energy loss entirely.
Every wall. Every opening. One system. Full envelope performance.
GreenGirt CMH™ for Opaque Walls
Field insulated sub-framing — structural support and thermal break integrated into a single sub-framing system. Compatible with all major rainscreen and ventilated facade assemblies.
GreenGirt XO™ for Transitions & Window Openings
Insulated sub-framing for windows and openings — structural thermal sub-framing at every head, jamb and sill. The most thermally vulnerable transitions in the building envelope, solved at the source.
Engineered Support for Every Stakeholder
Whether you’re a builder, architect, or building services engineer, Advanced Architectural Products provides the technical support to specify with confidence.
For Architects & Specifiers
Specify with confidence.
- Load verification and code compliance support
- Product optimisation for your specific project
- Up to 3:1 faster installation, fewer trades, less risk
- Dedicated installation and technical support team
For Builders & Contractors
On-time. On-budget. On-spec.
- Safe, efficient building envelope design guidance
- Expert guidance for NCC 2025 Section J compliance
- Reduces liability with engineered, tested systems
- EPD, Declare label, Red List free, Green Star ready
Complimentary Engineering Support on Every Project
Our in-house engineers know these systems inside and out. Every GreenGirt project includes complimentary engineering support, from preliminary design through to construction documentation.
Engineered for Australia. Proven across 4,500+ projects worldwide.
Advanced Architectural Products brings GreenGirt CMH™ insulated sub-framing systems to the Australian commercial construction market — backed by two decades of project experience and hands-on engineering support from first specification to final installation.