Fire compliance for internal linings has become significantly more complex under recent NCC changes. For architects, builders and surveyors, the challenge is no longer simply selecting a product with a stated Fire Group number, it is confirming that the installed lining system complies with the NCC in the exact form it will be built.
This is where many projects encounter risk.
Changes to spacing, perforation, substrate, geometry or installation method can alter fire behaviour and invalidate assumptions based on testing of a different configuration.
Compliance must be demonstrated for the installed system, not the base material in isolation.
At SUPAWOOD, our role is not simply to supply lining products. It is to help project teams navigate the compliance pathway with greater clarity and confidence.
Why Fire Compliance Has Become More Difficult
Under Specification 7 of the NCC 2022, Fire Hazard Properties are classified using AS 5637.1, based on testing such as AS/NZS 3837 or AS ISO 9705.
The challenge is that many architectural lining systems now include:
- Perforations for acoustic performance
- Slatted or batten geometries
- Joints and open spacing
- Customised configurations
These features can significantly affect fire behaviour and often require full-scale testing rather than small-scale prediction methods.
As a result, relying on a Fire Group classification without understanding the tested configuration can create approval risk later in the project.
Where Compliance Issues Commonly Arise
In many projects, fire compliance problems do not appear until:
- Certification review
- Construction documentation
- Procurement substitution
- Installation changes on site
Common issues include:
- Using test data from a different configuration
A flat panel classification may not apply to perforated or slatted systems - Modifying systems after testing
Changes to spacing, backing or finishes can alter performance. - Relying on incomplete documentation
Certificates may not reflect the actual installed assembly. - Confusion between Fire Group and non-combustibility requirements
These are separate NCC pathways and are often misunderstood.
These issues can lead to redesign, delays and additional assessment requirements late in the process.
How SUPAWOOD Supports Compliance
SUPAWOOD lining systems are tested and documented as complete systems, including configuration, substrate and geometry.
This allows project teams to:
- Identify systems aligned with required Fire Groups
- Review tested configurations early in design
- Access supporting documentation for certification
- Reduce uncertainty during approval and procurement
Rather than relying on assumptions about base materials, the focus is placed on the actual installed condition.
Supporting Architects and Specifiers Early
The earlier fire compliance is considered, the easier it becomes to align design intent with NCC requirements.
SUPAWOOD regularly works with architects, designers and builders to help assess:
- Required Fire Group classifications
- Suitability of perforated or slatted systems
- Compliance implications of customisation
- Lining selection for high-risk areas
- Documentation requirements for approval
This is particularly valuable where projects involve:
- Education buildings
- Healthcare facilities
- Public corridors and exits
- Transport infrastructure
- Large-scale acoustic lining systems
Understanding the Correct Testing Pathway
One of the most common misunderstandings in the market is assuming that AS/NZS 3837 applies to all lining systems.
In practice, systems with:
- Joints
- Perforations
- Gaps
- Complex geometry
often require classification using AS ISO 9705 full room burn testing under AS 5637.1.
Understanding which pathway applies is critical to avoiding compliance risk.
Why Documentation Matters
Surveyors and certifiers require evidence that the installed system matches the tested or assessed system.
This means documentation should clearly identify:
- The tested configuration
- Substrate and backing conditions
- Spacing and geometry
- Finishes and treatments
- Applicable Fire Group classification
Clear documentation reduces ambiguity during certification and helps avoid late-stage approval issues.
Fire Compliance Should Support Design, Not Restrict It
Architectural lining systems are increasingly expected to deliver:
- Acoustic performance
- Visual warmth
- Integration with services
- Curved geometry
- Durability and maintainability
Achieving these outcomes while maintaining fire compliance requires coordination between design intent and tested system performance.
When compliance is considered early, it becomes much easier to balance aesthetics, performance and approval requirements.
Need Help Navigating Fire Compliance?
If your project includes perforated, slatted, customised or acoustically open lining systems, it is worth confirming the compliance pathway before documentation is finalised.
SUPAWOOD can help review:
- Required Fire Group classifications
- Likely testing pathways
- Suitable lining systems
- Available documentation
Explore tested system and compliance documentation here: