Form · Sizes pending
Metallic — indicative fig. M·93
Fire A1 Non-combustibleEmbodied carbon 1.00kgCO₂e/kg Low–mediumCompressive 100-140MPa StructuralDesign life 80yr Durable
Premium zinc roofing system with standing seam profile for long-term weather protection
01 Physical
Density 7180kg/m3
Specific gravity 7.18
Porosity 0%
Water absorption 0%
Hardness 2.5Mohs
UV resistance excellent
Chemical resistance moderate
pH tolerance 6-12.5pH
Surface roughness 0.2-8.0um
02 Mechanical
Tensile strength 150-180MPa
Compressive strength 100-140MPa
Flexural strength 100-140MPa
Shear strength 90-105MPa
Poisson's ratio 0.25
Impact resistance moderateJ
Creep resistance good
03 Thermal
Thermal conductivity 110W/mK
Specific heat 390J/kgK
Thermal expansion 0.022mm/m/degC
04 Compliance & Fire First question
Combustibility class Non-combustible (A1/A2)
Fire resistance level N/A - cladding elementminutes
Ignition temp N/A - does not ignitedegC
Flame spread index 0
Smoke dev. index 0
Heat release rate 0kW/m2
05 Sustainability & Health
Embodied carbon 1.0-3.9kg CO2-eq/kg
Carbon footprint 5-19.5kg CO2-eq/m2
Embodied energy 17.4-56.4MJ/kg
Water footprint 5-60L/kg
Recyclability 100%
Recycled content 30-50%
Renewable content 0%
Circular score 9.0/10
VOC emissions 0ug/m3
Toxicity rating low
LEED contribution 2-4points
06 Durability · Cost · Logistics
Expected lifespan 80-200years
Maintenance interval 1825-3650days
Warranty period 20-50years
Material cost (range) 50-130AUD/m2
Material cost (per unit) 70-100AUD/m2
Lead time 5-98days
Lifecycle cost 200-400AUD/m2
Annual maintenance 0.50-1.50AUD/m2/year
Market availability good
07 Assessment
Advantages
- Self-protecting zinc carbonate patina - no painting or coating maintenance required
- Long lifespan: 80-100+ years roofing, up to 200 years walls
- 100% recyclable without quality loss - strong circular economy credentials
- Non-combustible (A1) - suitable for all NCC building classifications
- Excellent formability - can be shaped to complex curves and geometries
- Low maintenance cost over building lifetime
- Published EPDs and strong environmental certifications (ILFI Declare Label)
- Self-healing patina repairs scratches and surface damage over time
Constraints
- High thermal expansion coefficient (0.022 mm/m/degC) requires careful detailing for movement
- Temperature-sensitive workability - cannot be cold-bent below 7-10 degC without risk of cracking
- Susceptible to underside corrosion if ventilation is inadequate (white rust)
- Galvanic corrosion risk with dissimilar metals (especially copper and steel)
- Relatively soft material - susceptible to denting from hail and foot traffic damage
- Premium cost compared to steel roofing (Colorbond) and aluminium
- Patina runoff can stain adjacent porous materials
08 Applications
A1 Standing Seam Roofing Primary application - mechanically seamed or snap-lock standing seam roofing for residential, commercial, and institutional buildings with minimum 5-degree pitch
A2 Facade Cladding Standing seam, interlocking panel, and cassette systems for vertical building facades in contemporary architectural design
A3 Rainscreen Systems Ventilated rainscreen facade cladding with zinc outer skin on metal rails or timber battens with insulated backing wall
A4 Curved Roofing and Facades Complex curved and double-curved roof and wall surfaces exploiting zinc's excellent formability at warm temperatures
A5 Gutters and Rainwater Systems Custom and standard zinc gutters, downpipes, and rainwater goods - natural complement to zinc roofing
09 Sources & Standards
Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.