organic / Timber / Structural Timber
Silvertop Ash timber cladding, various grades & profiles (19mm, 21mm)
Australian native hardwood cladding with excellent bushfire resistance (BAL-29), moderate durability, and distinctive brown colouring with pink tinge. Suitable for external cladding in bushfire-prone areas.
Atlas code
ORG-TBR-ST-004
At-a-glance signals
Australian native hardwood cladding with excellent bushfire resistance (BAL-29), moderate durability, and distinctive brown colouring with pink tinge. Suitable for external cladding in bushfire-prone areas.
Overview
Executive summary
This material is currently undergoing detailed analysis and data compilation. Australian native hardwood cladding with excellent bushfire resistance (BAL-29), moderate durability, and distinctive brown colouring with pink tinge. Suitable for external cladding in bushfire-prone areas.
Best when…
- organic material benefits
Top advantages
- 01 organic material benefits
Top limitations
- 01 High density (~950–1100 kg/m³) — heavier than most hardwood cladding species; long boards require two-person installation and robust fixing systems
- 02 Very high Janka hardness (11.0 kN) — among the hardest Australian cladding timbers; carbide tooling essential, nail-gun pre-boring required to avoid splitting
- 03 Durability Class 2 per AS 5604 — lower than Blackbutt Class 1; above-ground external use only without treatment; periodic recoating critical for longevity
- 04 Prone to surface checking in exposed conditions — interlocked grain and high density create tension during drying; boards can develop visible surface cracks within 1–2 seasons
- 05 Supply cost $90–200/m² installed — premium hardwood pricing similar to Blackbutt; limited plantation availability means supply depends on native forest sourcing
Technical
Physical ·1
- Density
- null Data pending
Mechanical ·1
- Compressive strength
- null Data pending
Sustainability & Health
Embodied carbon & energy ·1
- Carbon footprint
- null Data pending
Compliance & Fire
Fire performance ·1
- Fire resistance level
- null Data pending
Cost & Lifecycle
Capex & lead time ·1
- Material cost (range)
- null Data pending
Service life & durability ·1
- Expected lifespan
- null Data pending
Layer D
Where it's used
organic applications