Aluminium and fibre cement are two of the most commonly specified external cladding materials in Australian construction. Both can meet the NCC’s non-combustibility requirements. Both have decades of track record on real projects. The right choice between them depends on the specifics: weight constraints, durability expectations, maintenance access, lifecycle cost, and the building’s intended service life. This article sets out the practical differences to help specifiers make an informed decision.
How do aluminium and fibre cement compare on fire performance?
This is often the starting point, and the answer is straightforward: both materials can satisfy AS 1530.1 non-combustibility testing.
Aluminium is inherently non-combustible. It is metal. Under NCC 2022 clause C2D10(5), aluminium and aluminium alloys are listed as deemed non-combustible materials alongside steel, masonry, concrete, and ceramics. There is no ambiguity and no dependency on formulation or manufacturing process.
Fibre cement is also generally non-combustible. Most compressed fibre cement sheet products on the Australian market pass AS 1530.1 testing. However, fibre cement is a composite material, and its composition can vary between manufacturers and product lines. Specifiers should always confirm AS 1530.1 test results for the specific product being considered rather than assuming all fibre cement is equivalent.
For NCC Type A and Type B construction, both materials are compliant options under a Deemed-to-Satisfy pathway. On fire performance alone, neither material holds a decisive advantage.
The critical distinction in the post-Lacrosse, post-Grenfell regulatory environment is between these genuinely non-combustible materials and aluminium composite panels (ACPs) with polyethylene cores, which are combustible and no longer compliant where non-combustible materials are required. Solid aluminium panels like element13 and fibre cement panels are both on the right side of that line.
What are the key differences in durability and maintenance?
This is where the two materials diverge significantly.
Moisture performance. Aluminium is non-absorbent. It does not swell, warp, or degrade from moisture exposure. Fibre cement absorbs moisture, particularly at cut edges and through unsealed surfaces. In practice, this means fibre cement panels can experience moisture-related dimensional movement, and exposed edges must be sealed during installation to prevent long-term degradation. BRANZ research has documented that unpainted fibre cement will absorb moisture over time, which can lead to surface deterioration and, in some cases, biological growth on damp surfaces.
Impact resistance. Aluminium is metal. Under impact, it may dent but will not crack, chip, or shatter. Fibre cement is a brittle material; it can chip or crack on impact, particularly at edges and corners. For facades exposed to potential mechanical damage, whether from maintenance activities, landscaping equipment, or public interaction, aluminium is significantly more resilient.
Coating longevity. High-performance PVDF coatings on aluminium panels are tested to AAMA 2605, which requires 10 years of South Florida weathering exposure for colour retention, chalk resistance, and gloss retention. These coatings typically carry 20-year warranties and perform well beyond that in practice. Industry data suggests PVDF-coated aluminium can maintain its appearance for 20 to 30 years without recoating, even under high UV exposure.
Fibre cement relies on applied paint finishes that degrade faster under UV and weather exposure. Repainting is typically required every 10 to 15 years, depending on orientation, climate, and coating quality. Each repainting cycle involves scaffold access, surface preparation, and coating application, which adds significant cost over the building’s life.
Dimensional stability. Aluminium’s dimensional movement is limited to thermal expansion (approximately 23 microns per metre per degree Kelvin). This is predictable and well understood in facade design. Fibre cement experiences both thermal movement and moisture-related movement, which is less predictable and can cause joint opening, panel distortion, or fixing stress over time.
How does weight affect facade design?
A 3mm solid aluminium panel weighs approximately 8 kg/m². A typical 9mm compressed fibre cement sheet weighs in the range of 14 to 16 kg/m², roughly twice as heavy.
This weight difference has practical implications:
Substructure design. Heavier cladding requires a more substantial support framework, adding material cost and dead load to the building. For large facades, the cumulative weight difference is significant.
Handling and installation. Lighter panels are easier to manoeuvre on scaffolding, require less lifting equipment, and allow faster installation rates. This is particularly relevant for high-rise projects where crane time and elevated work are major cost drivers.
Structural loading. In reclad projects, the existing structure may have limited capacity for additional load. The lighter weight of aluminium can be the difference between a feasible reclad and one that requires structural upgrades.
What about lifecycle cost?
Fibre cement has a lower initial cost per square metre. That is a genuine advantage, and there is no point pretending otherwise. For projects where the upfront budget is the primary constraint, fibre cement can be a rational choice.
However, initial cost is only part of the picture. Total cost of ownership over the building’s design life tells a different story.
The major lifecycle cost differentiator is repainting. A fibre cement facade on a multi-storey building will typically need repainting every 10 to 15 years. Each cycle requires scaffold erection, surface preparation, and professional coating application. Australian industry data puts exterior repainting costs for a standard multi-storey building at tens of thousands of dollars per cycle, with access costs often exceeding the paint itself.
Over a 50-year building life, a fibre cement facade may require three to four repainting cycles. An aluminium facade with PVDF coating typically requires none, with routine washing (mild detergent and water, quarterly in most environments) being the primary maintenance activity.
When these repainting cycles are factored in, aluminium’s higher initial cost is often recovered within 15 to 20 years, and the total cost of ownership over 50 years can be substantially lower.
Service life. Aluminium facades routinely achieve 50-plus year service lives. The aluminium itself is essentially permanent; it is the coating and fixings that determine practical lifespan. Fibre cement manufacturers typically indicate service lives of 25 to 50 years depending on installation quality, maintenance discipline, and environmental exposure. In coastal or high-UV environments, the practical life of fibre cement without significant maintenance investment tends toward the lower end of that range.
Which performs better in Australian conditions?
Australia’s climate is hard on building facades. UV intensity, coastal salt environments, temperature cycling, and severe storm events all test cladding materials in ways that moderate climates do not.
UV exposure. Australia has some of the highest UV radiation levels globally. PVDF-coated aluminium is specifically engineered for UV resistance, with fluoropolymer chemistry that resists chalking and colour degradation. Fibre cement’s painted surfaces are more susceptible to UV-driven coating breakdown, which is why the repainting cycle is shorter in high-UV regions such as Queensland and northern NSW.
Coastal salt. Aluminium forms a natural oxide layer that protects against corrosion, even in salt-laden environments. This self-passivation is an inherent material property. Fibre cement performs adequately in coastal conditions when properly sealed and maintained, but moisture ingress at edges and fixings is a greater risk in salt environments, and any break in the paint system accelerates deterioration.
Temperature cycling. Both materials handle Australia’s temperature range without issue, though aluminium’s thermal expansion requires proper allowance in joint design.
Storm and hail. Solid aluminium panels tested to ANSI FM 4473 for hail impact provide measurable impact resistance. Fibre cement’s brittle nature makes it more vulnerable to severe hail or wind-borne debris.
Side-by-side comparison
| Factor | Solid Aluminium Panels | Fibre Cement Panels |
|---|---|---|
| Combustibility | Non-combustible (AS 1530.1) | Generally non-combustible (confirm per product) |
| Typical weight | ~8 kg/m² (3mm panel) | ~14-16 kg/m² (9mm sheet) |
| Impact resistance | High (dents, does not crack) | Lower (can chip, crack on impact) |
| Moisture absorption | Nil | Absorbs moisture; edges must be sealed |
| Dimensional stability | Thermal expansion only | Thermal + moisture movement |
| Maintenance | Quarterly wash, no repainting | Repainting every 10-15 years |
| Expected service life | 50+ years | 25-50 years (maintenance dependent) |
| Coating warranty | Up to 20 years (PVDF) | Varies by manufacturer and coating |
| Recyclability | 100% recyclable (95% energy saving) | Not recyclable; disposed to landfill |
| Initial cost per m² | Higher | Lower |
| Lifecycle cost (50yr) | Lower (no repainting cycles) | Higher (3-4 repainting cycles) |
| Colour and finish range | Powder coat, anodised, woodgrain, metallic, custom | Paint, texture, limited through-colour |
| Coastal performance | Excellent (natural oxide protection) | Good if maintained; edge sealing critical |
When is each material the right choice?
Fibre cement makes sense for projects where upfront budget is the primary driver and long-term maintenance costs are accepted as part of the building’s operating plan. It is a familiar material with a well-understood installation methodology, and it performs well in many standard applications. For lower-rise buildings with easy maintenance access, the repainting cycle is manageable and economical.
Aluminium makes sense for buildings with long design lives, facades where maintenance access is difficult or expensive (high-rise, complex geometry), coastal or high-UV environments, projects where weight constraints matter, and where the client is evaluating total cost of ownership rather than initial cost alone. Its aesthetic versatility, with powder coat, anodised, woodgrain, and metallic finishes, also makes it the more flexible option for design-led projects.
The sustainability question
This is worth addressing directly, because the picture is nuanced.
Aluminium has higher embodied energy than fibre cement in its primary production. That is a fact, and it is significant. The International Aluminium Institute reports that primary aluminium production is energy-intensive.
However, aluminium is 100% recyclable, and recycling uses just 5% of the energy required for primary production, a 95% energy saving. Building-sector aluminium recycling rates exceed 90% globally. At end of life, aluminium cladding retains real scrap value and re-enters the material cycle.
Fibre cement is not recyclable. At end of life, it goes to landfill. Combined with a shorter service life and the environmental cost of multiple repainting cycles (including paint manufacture, transport, and application), fibre cement’s lower embodied energy at manufacture does not necessarily translate to a lower lifetime environmental impact.
Specifiers evaluating sustainability should consider the full lifecycle, not just the production phase.
Making the decision
Both aluminium and fibre cement are legitimate, NCC-compliant cladding materials with genuine strengths. The choice is not about one being categorically better than the other. It is about matching the material to the project’s priorities: budget constraints, design life, maintenance strategy, environmental exposure, aesthetic requirements, and sustainability goals.
At Valmond & Gibson, we supply non-combustible aluminium facade systems, so our perspective naturally leans toward aluminium’s long-term advantages. But we would rather specifiers make an informed decision based on real data than choose any material for the wrong reasons. A well-specified fibre cement facade is better than a poorly specified aluminium one, and vice versa.
If you are weighing up materials for an upcoming project, we are always happy to discuss the specifics and provide technical data to support your evaluation.
Sources: NCC 2022 (ABCB), AS 1530.1, AAMA 2605, International Aluminium Institute (recycling energy data), BRANZ (fibre cement moisture performance), ANSI FM 4473 (hail impact testing). V&G product data: CSIRO test reports FNC12545, FNC12595; Ian Bennie & Associates reports 2021-083, 2022-031-S2; Intertek coating certification 210203002SHF-001.
Related Reading
- Solid Aluminium vs Composite Panels: A Compliance Guide
- Choosing the Right Aluminium Facade System for Your Project
- Aluminium Cladding in Bushfire Zones: BAL Ratings
- The Hidden Costs of Choosing the Cheapest Cladding
Last updated: 3 April 2026