Repair Systems — 03
Cladding Failure
Technical product reference for fire-rated cladding replacement systems (FR-core ACP, solid aluminium, fibre cement), panel re-coating, joint sealant replacement and stainless 316 cladding fixing systems for cladding failure on Class 2 strata buildings in Australia.
What are cladding failure repair systems?
Cladding failure on Class 2 strata buildings encompasses non-compliant, delaminated, corroded, or impact-damaged external wall cladding panels requiring remediation. The primary driver of cladding remediation in Australia since 2017 has been the identification of non-compliant polyethylene-core (PE-core) aluminium composite panel (ACP) cladding — a combustible material that was prohibited or restricted on Class 2 buildings above certain heights under NCC 2022 and preceding building codes following the 2017 Grenfell Tower fire in London.
NCC 2022 Section C imposes fire performance requirements for external walls of Class 2 buildings. The key distinction is between FR-core ACP (fire-retardant mineral-filled core — reduced combustibility), A2 non-combustible materials (such as solid aluminium, fibre cement, or steel), and non-compliant PE-core ACP (combustible polyethylene core — prohibited on Class 2 buildings above certain heights). All cladding replacement on Class 2 buildings requires fire engineering assessment to confirm compliance with the current NCC 2022 deemed-to-satisfy provisions applicable to the building height and construction type.
Repair systems for cladding failure include full panel replacement with FR-core ACP or non-combustible alternatives, recoating of structurally sound panels where the substrate is confirmed compliant, stainless 316 cladding anchor replacement in coastal environments, and facade joint sealant replacement. All cladding replacement requires a facade engineer to design the sub-frame system, fixing specification, and panel joint design, and a fire engineer to confirm NCC 2022 compliance.
Do not confuse cladding replacement systems with:
- PE-core ACP (polyethylene core) — non-compliant — combustible core — banned on Class 2 buildings above certain heights under NCC 2022
- Lightweight render coatings — not structural cladding — different product category — see render systems subcategories
- Timber cladding — combustible — NCC 2022 restrictions apply to use on Class 2 buildings — confirm compliance with fire engineer
- Facade paint and coating systems — surface coating only — not a structural cladding replacement system
Product Reference
4 products — 4 brands — cladding replacement and fixing systems — scroll to view all
System Description
Alucobond FR is a fire-retardant mineral-core aluminium composite panel (ACP) manufactured by 3A Composites and widely used for cladding replacement on Class 2 strata buildings in Australia. The FR designation refers to the fire-retardant mineral-filled core, distinguishing it from combustible PE-core ACP panels that are non-compliant on Class 2 buildings above certain heights under NCC 2022. Alucobond FR is one of the benchmark FR-core ACP products for facade remediation following the post-Grenfell regulatory tightening of cladding requirements in Australia. Alucobond FR panels are typically mechanically fixed to a sub-frame system using compliant facade fixings. The panel system requires engagement of a facade engineer to design the structural sub-frame, panel layout, joint design, and fixing specification. All cladding replacement on Class 2 buildings must comply with NCC 2022 C-requirements for external wall fire performance. Confirm current product compliance against the specific NCC 2022 deemed-to-satisfy provisions applicable to the building height and construction type with a fire engineer before specifying.
Technical Properties
- FR-core (fire-retardant mineral-filled core) — substantially reduced combustibility compared to PE-core ACP — confirm NCC 2022 compliance with fire engineer
- Aluminium skins both faces — typically 0.5 mm aluminium — available in a wide range of anodised and PVDF paint finishes
- Standard panel thickness 4 mm — available in larger sheet sizes for facade cladding applications — confirm with 3A Composites for current product range
Limitations
- FR-core ACP is not A2 non-combustible — confirm compliance against NCC 2022 C-requirements for the specific building height and construction type with a fire engineer before specifying
- All cladding replacement on Class 2 buildings requires fire engineering assessment and facade engineering input — do not specify without professional engineering advice
- Panel joint design, sealant selection, and sub-frame design must be confirmed by a facade engineer — not a DIY or non-specialist application
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Description
Scyon Axon Panel by James Hardie is a factory-primed fibre cement compressed sheet cladding panel used for non-combustible facade replacement on Class 2 strata buildings. Fibre cement is a non-combustible material and meets Group 1 classification under AS 1530.1, making it compliant for use on Class 2 buildings under NCC 2022 external wall fire performance provisions. Scyon Axon Panel features a vertical grooved profile and is available in a range of widths, making it suitable for contemporary facade aesthetics in cladding replacement projects. Scyon Axon Panel is factory-primed and requires a topcoat applied on-site after installation. Joint design, fixing specification, and sub-frame design must be confirmed by a facade engineer. James Hardie provides detailed installation guides for the Scyon range — confirm current installation requirements and fixing specifications with James Hardie technical before specifying. All cladding replacement on Class 2 buildings must be confirmed against NCC 2022 C-requirements with a fire engineer.
Technical Properties
- Non-combustible fibre cement substrate — Group 1 classification under AS 1530.1 — suitable for use on Class 2 buildings under NCC 2022 external wall provisions
- Factory-primed — two-coat topcoat system applied on-site over primer — paint finish selection must comply with James Hardie Scyon coating requirements
- Vertical grooved profile — 133 mm, 200 mm and other groove spacings available — confirm current range with James Hardie
Limitations
- Requires on-site painting — paint system must comply with James Hardie Scyon coating requirements — confirm with James Hardie technical
- All cut edges, drilled holes, and joints must be sealed per James Hardie installation guide to prevent moisture ingress and deterioration
- Sub-frame design, fixing specification, and joint design must be confirmed by a facade engineer — not a self-specified system
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Description
Interpon D2525 by AkzoNobel is an AAMA 2605-rated super-durable architectural powder coating used for aluminium cladding panel recoating, colour change, and panel refurbishment on building facades. AAMA 2605 is the highest durability specification for organic coatings on architectural aluminium and requires proven performance in Florida weathering and UV exposure testing. Interpon D2525 is applied by powder coating applicators under controlled factory conditions and is not a site-applied product. Panel recoating with Interpon D2525 or equivalent AAMA 2605-rated powder coating is an alternative to full cladding panel replacement where the structural substrate of existing aluminium panels is sound. This approach requires removal of panels from the building facade, strip and recoat in a powder coating facility, and reinstallation. The decision between panel recoating and full replacement must be made by a facade engineer. Confirm current product availability, colour range, and specification with AkzoNobel Interpon Australia before specifying.
Technical Properties
- AAMA 2605-rated — highest durability specification for organic coatings on architectural aluminium — proven UV and weathering resistance
- Super-durable powder coating — minimum 70% gloss retention after 10 years Florida weathering per AAMA 2605 requirements
- Applied by approved powder coating applicators under controlled factory conditions — not a site-applied product
Limitations
- Factory-applied only — panels must be removed from the building, stripped and recoated in a powder coating facility — site application is not possible
- Surface preparation is critical — existing coating must be fully stripped and aluminium pre-treated before recoating — confirm pretreatment specification with AkzoNobel Interpon
- Panel condition must be assessed by a facade engineer before specifying recoating — panels with structural damage or delamination are not suitable for recoating
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Description
Hilti MFT (Multi-Function Track) Facade Fixing is a stainless 316 mechanical panel fixing anchor system used for cladding replacement on Class 2 strata buildings. The MFT system provides adjustable, concealed panel fixing to the building structure via an aluminium sub-frame, accommodating facade tolerance and thermal movement. 316 stainless steel fasteners are specified in coastal and corrosive environments to resist long-term corrosion. All cladding fixing systems for Class 2 buildings require structural engineering design and sign-off. The facade engineer is responsible for designing the fixing system, sub-frame, and structural connection to the building to comply with NCC 2022 structural and fire performance requirements. Hilti provides load data and installation guidance for the MFT system — confirm current product specification, design data, and availability with Hilti Australia before specifying. Do not specify facade fixing systems without facade engineering input.
Technical Properties
- 316 stainless steel fasteners — suitable for coastal and corrosive environments on Class 2 strata buildings
- Adjustable concealed fixing system — accommodates facade tolerance and thermal movement of cladding panels
- Designed for use with aluminium sub-frame systems in ventilated rainscreen cladding assemblies
Limitations
- Structural design by a facade engineer is mandatory — do not specify or install cladding fixing systems without engineering input and sign-off
- Fixing capacity must be confirmed against facade engineer design loads — generic load data is not a substitute for project-specific structural design
- Substrate must be assessed for anchoring capacity before specifying — concrete, masonry, and steel structure have different anchoring requirements
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Comparison
Side-by-side technical comparison of cladding replacement and fixing products for Class 2 strata buildings. Confirm current product specifications with manufacturer TDS and fire engineering advice.
| Product | Brand | Material | Fire rating | Application | Fixing system | Primary use |
|---|---|---|---|---|---|---|
| Alucobond FR | 3A Composites | Aluminium composite (FR-core) | FR-core — confirm NCC 2022 with FE | Mechanically fixed to sub-frame | Concealed panel anchor system | FR-core ACP cladding replacement — Class 2 buildings |
| Scyon Axon Panel | James Hardie | Fibre cement compressed sheet | Non-combustible — Group 1 AS 1530.1 | Mechanically fixed to sub-frame | Nail / screw fixed per Hardie guide | Non-combustible fibre cement cladding replacement |
| Interpon D2525 | AkzoNobel | Powder coating (aluminium panels) | N/A — coating system | Factory-applied — panels removed | N/A — coating only | Panel recoating and colour change — AAMA 2605 |
| Hilti MFT Facade Fixing | Hilti Australia | 316 stainless steel anchor | N/A — structural fixing | Mechanical fixing to structure | Adjustable concealed panel anchor | Stainless 316 cladding panel fixing — Class 2 buildings |
Brand Equivalents
Cladding system equivalents across brands active in Australian Class 2 strata remediation.
| System type | 3A Composites | James Hardie | AkzoNobel | Hilti |
|---|---|---|---|---|
| FR-core ACP cladding | Alucobond FR | — | — | — |
| Fibre cement cladding | — | Scyon Axon Panel | — | — |
| Panel recoating system | — | — | Interpon D2525 | — |
| Stainless cladding anchor | — | — | — | MFT Facade Fixing |
NCC 2022 fire compliance
- PE-core ACP (polyethylene core aluminium composite panel) is non-compliant on Class 2 buildings above certain heights under NCC 2022 — recoating a PE-core panel does not make it compliant — full panel replacement is required
- NCC 2022 Section C requires that external walls of Class 2 buildings meet fire performance requirements — only FR-core or A2 non-combustible cladding materials are acceptable depending on building height and construction type
- FR-core ACP is not the same as A2 non-combustible — confirm which classification is required for the specific building with a fire engineer before specifying
- All cladding replacement on Class 2 buildings requires fire engineering assessment — do not specify cladding systems without fire engineer and facade engineer input
- NCC 2022 deemed-to-satisfy provisions for cladding are subject to update — confirm current requirements with a fire engineer before specifying any cladding system
Disclaimer
Information is general only. Cladding replacement must be confirmed against NCC 2022 fire performance requirements, building height, and the specific cladding system design. FR-core ACP and non-combustible alternatives must be confirmed against current NCC deemed-to-satisfy provisions. Engage a fire engineer and facade engineer for cladding replacement specifications. Do not rely on this reference as a substitute for professional engineering advice.