Silvertop Ash timber cladding, various grades & profiles (19mm, 21mm)
Structural Timber
ATLAS CODE
ORG-TBR-ST-004
Category organic
Material Family Timber
Regulatory Status Standards review in progress
Density
null
Carbon (A1-A5)
null
Lifespan
null
Description
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.
Typical Uses
- organic applications
Embodied Carbon null
Advantages
organic material benefits
Cautions
High density (~950–1100 kg/m³) — heavier than most hardwood cladding species; long boards require two-person installation and robust fixing systemsVery high Janka hardness (11.0 kN) — among the hardest Australian cladding timbers; carbide tooling essential, nail-gun pre-boring required to avoid splittingDurability Class 2 per AS 5604 — lower than Blackbutt Class 1; above-ground external use only without treatment; periodic recoating critical for longevityProne to surface checking in exposed conditions — interlocked grain and high density create tension during drying; boards can develop visible surface cracks within 1–2 seasonsSupply cost $90–200/m² installed — premium hardwood pricing similar to Blackbutt; limited plantation availability means supply depends on native forest sourcingBAL-29 compliant per AS 3959 but combustible — not suitable for BAL-40 or BAL-FZ zones without additional fire protection; verify with certifier for site-specific BAL assessmentLimited profile availability compared to mainstream species — fewer suppliers stock 21mm Silvertop Ash in full range of profiles (rebated, shiplap, square-edge)External maintenance required every 2–3 years (oil or penetrating stain) — untreated surfaces weather to silver-grey with surface checking and potential fungal stainingRegional availability concentrated in NSW/VIC alpine regions — project logistics and lead times add cost for other states
TECHNICAL DATA: PERFORMANCE PROPERTIES ORG-TBR-ST-004
Density (Dry) null
Compressive Strength null
Thermal Conductivity null
SAFETY, ECOLOGY & INSTALLATION ORG-TBR-ST-004
Fire Resistance Rating null
Embodied Carbon (A1-A3) null
Skill Level Professional
Required Tools
To be determined
COMMERCIAL, LOGISTICS & REGULATORY ORG-TBR-ST-004
Material Cost null
Design Life null
DISCLAIMER: This specification document is generated from the CLAD Materials Atlas Database. Information is for general guidance only and does not constitute professional engineering advice. Values are typical and may vary by batch, manufacturer, and production run. Verify suitability for specific project applications independently.