Blackbutt timber cladding/screening, various grades & profiles (19mm, 21mm, 25mm)
Structural Timber
ATLAS CODE
ORG-TBR-ST-003
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. Premium Australian hardwood cladding from Eucalyptus pilularis with Class 1 durability, BAL-29 bushfire rating, and excellent structural properties. Available in 19mm, 21mm, and 25mm profiles for external and internal applications.
Typical Uses
- organic applications
Embodied Carbon null
Advantages
organic material benefits
Cautions
Durability Class 1 per AS 5604 but rated for above-ground use only without preservative treatment — in-ground contact requires H4/H5 treatmentHigh density (~900–1100 kg/m³) makes long boards heavy for cladding; boards over 3.6 m typically require two-person handlingPremium supply cost $80–180/m² installed — approximately 2–3x the cost of equivalent pine cladding profilesTangential shrinkage ~8–10% means only seasoned timber (MC <15%) per AS/NZS 2796 is suitable; green timber risks significant movement and cuppingHigh Janka hardness (9.1 kN) makes machining and nail-driving difficult — carbide-tipped tooling required; standard HSS blades blunt rapidlyCombustible softwood — BAL-29 maximum per AS 3959 without additional fire protection systems; not suitable for BAL-40 or BAL-FZ zones as-suppliedLimited availability of clear/select grades — knots, gum veins, and interlocked grain are common in standard grades; select-grade stock commands significant price premiumExternal surfaces require regular maintenance coating (oil or stain) every 2–3 years to prevent surface checking, UV greying, and moisture ingressRegional supply variability — sourced primarily from NSW/QLD; longer lead times and transport costs for Victoria, SA, and WA projects
TECHNICAL DATA: PERFORMANCE PROPERTIES ORG-TBR-ST-003
Density (Dry) null
Compressive Strength null
Thermal Conductivity null
SAFETY, ECOLOGY & INSTALLATION ORG-TBR-ST-003
Fire Resistance Rating null
Embodied Carbon (A1-A3) null
Skill Level Professional
Required Tools
To be determined
COMMERCIAL, LOGISTICS & REGULATORY ORG-TBR-ST-003
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.