mineral / Metallic / Non-Ferrous Metals
Zinc Standing Seam
Premium zinc roofing system with standing seam profile for long-term weather protection
Atlas code
MIN-MET-NF-003
At-a-glance signals
Premium zinc roofing system with standing seam profile for long-term weather protection
Overview
Executive summary
Titanium zinc (zinc-copper-titanium alloy per EN 988) is a premium architectural roofing and cladding material supplied by manufacturers including VMZINC, RHEINZINK, elZinc, and NedZink. The alloy comprises 99.995% pure zinc with controlled additions of copper (0.08-1.0%) and titanium (0.06-0.2%) for enhanced mechanical properties. With a density of 7,180 kg/m3, thermal conductivity of 110 W/mK, and tensile strength exceeding 150 MPa, titanium zinc offers excellent workability and durability. The material develops a self-protecting zinc carbonate patina over 3-10 years that provides corrosion resistance and a distinctive matte blue-grey aesthetic. Standing seam is the most common profile, featuring 25 mm high seams in single or double-lock configurations on 0.7-0.8 mm sheet. Classified non-combustible A1 per EN 13501-1 and AS 1530.1, zinc is suitable for all NCC building classifications without restriction. With an expected lifespan of 80-100+ years for roofing and up to 200 years for walls, 100% recyclability, and published EPDs, titanium zinc is recognised as one of the most sustainable metal cladding materials available.
Best when…
- 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
Top advantages
- 01 Self-protecting zinc carbonate patina - no painting or coating maintenance required
- 02 Long lifespan: 80-100+ years roofing, up to 200 years walls
- 03 100% recyclable without quality loss - strong circular economy credentials
- 04 Non-combustible (A1) - suitable for all NCC building classifications
- 05 Excellent formability - can be shaped to complex curves and geometries
Top limitations
- 01 High thermal expansion coefficient (0.022 mm/m/degC) requires careful detailing for movement
- 02 Temperature-sensitive workability - cannot be cold-bent below 7-10 degC without risk of cracking
- 03 Susceptible to underside corrosion if ventilation is inadequate (white rust)
- 04 Galvanic corrosion risk with dissimilar metals (especially copper and steel)
- 05 Relatively soft material - susceptible to denting from hail and foot traffic damage
Technical
Physical ·9
- Density
- 7180 kg/m3 Titanium zinc alloy per EN 988. Source: VMZINC General Technical Recommendations
- Specific gravity
- 7.18 Specific gravity relative to water. Source: VMZINC
- Porosity
- 0 % Wrought titanium zinc sheet is fully dense with zero open porosity. Impervious to water and gas penetration. Source: General metal property
- Water absorption
- 0 % Zero water absorption - zinc is completely impervious. The zinc carbonate patina is also insoluble in rainwater. Source: VMZINC FAQ
- Hardness
- 2.5 Mohs Zinc hardness 2.5 Mohs. Brinell hardness approximately 40-50 HB. Softer than copper and aluminium. Source: ASM International, zinc material data
- UV resistance
- excellent Excellent. UV radiation has no degradation effect on zinc. UV may slightly accelerate patina development. Zinc does not chalk, fade, or become brittle under UV exposure. Source: VMZINC technical data
- Chemical resistance
- moderate Moderate. Zinc is amphoteric - attacked by both acids and strong alkalis. Avoid contact with: wet cement/morite, western red cedar and oak (acidic tannins), bituminous materials, copper runoff (causes accelerated corrosion). Compatible with: aluminium, lead, stainless steel (with isolation). Source: VMZINC incompatibility guide
- pH tolerance
- 6-12.5 pH Zinc is amphoteric - corrodes in both strongly acidic (pH <6) and strongly alkaline (pH >12.5) conditions. Stable in pH 6-12.5 range. Avoid contact with wet cement (highly alkaline), acidic timber species (western red cedar, oak), and bituminous materials. Source: VMZINC technical recommendations, NedZink product features
- Surface roughness
- 0.2-8.0 um Natural zinc (mill finish): Ra 0.2-0.6 um. Pre-weathered surfaces (QUARTZ-ZINC, ANTHRA-ZINC): Ra 1-4 um. Fully patinated in-service: Ra 2-8 um. Source: VMZINC product specifications
Mechanical ·7
- Tensile strength
- 150-180 MPa Ultimate tensile strength per EN 988: >= 150 MPa minimum. Typical values 150-180 MPa. Higher in rolling direction than transverse. Source: VMZINC General Technical Recommendations, EN 988
- Compressive strength
- 100-140 MPa Zinc is ductile and deforms plastically in compression. Compressive yield approximately equal to tensile yield (100-140 MPa). Source: General metal mechanics
- Flexural strength
- 100-140 MPa Zinc is ductile. Bending test at 20 degC: no cracks (EN 988 requirement). Minimum bend radius at 20 degC: 0t for soft temper (can fold flat). IMPORTANT: Below 7-10 degC, zinc becomes brittle and cold bending without pre-heating risks cracking. Source: VMZINC, EN 988
- Shear strength
- 90-105 MPa Shear strength approximately 60-70% of tensile strength: 90-105 MPa. Source: Calculated from tensile data
- Poisson's ratio
- 0.25 Poisson's ratio for zinc. Source: ASM International
- Impact resistance
- moderate J Moderate. Zinc is relatively soft and ductile at room temperature - absorbs impact through deformation. Susceptible to denting from hail and foot traffic. Walk boards required for roof maintenance access. Charpy impact values vary significantly with temperature. Source: VMZINC installation guides
- Creep resistance
- good Good. Titanium zinc has significantly better creep resistance than pure zinc, which was historically prone to creep. The titanium addition (0.06-0.2%) specifically addresses creep resistance. However, zinc can still creep at elevated temperatures (above 60 degC) under sustained stress. Source: VMZINC technical data, EN 988 development history
Sustainability & Health
Embodied carbon & energy ·7
- Embodied carbon
- 1.0-3.9 kg CO2-eq/kg Global average primary zinc production: 3.89 kg CO2-eq/kg (International Zinc Association). Low-carbon producers: 1.85 kg CO2-eq/kg. Boliden recycled zinc: <3.8 kg CO2-eq/kg, low-carbon zinc: <1.0 kg CO2-eq/kg. VMZINC EPD values available in BRE and IBU declarations. Per m2 for 0.7 mm sheet (5.03 kg/m2): approximately 5-19.5 kg CO2-eq/m2. Source: International Zinc Association LCA, VMZINC IBU EPD, Boliden product data
- Carbon footprint
- 5-19.5 kg CO2-eq/m2 For 0.7 mm zinc sheet (5.03 kg/m2): 5-19.5 kg CO2-eq/m2 depending on recycled fraction and producer. Amortised over 100-year lifespan: 0.05-0.20 kg CO2-eq/m2/year. Source: Calculated from embodied carbon data
- Embodied energy
- 17.4-56.4 MJ/kg VMZINC rolled zinc cradle-to-gate: 56.4 MJ/kg (IBU EPD). Full life cycle including end-of-life recycling credit: 17.4 MJ/kg. 90% of embodied energy from primary zinc production. Per m2 for 0.7 mm sheet: approximately 87-284 MJ/m2 (cradle-to-gate). Source: VMZINC IBU Certifikat EPD
- Water footprint
- 5-60 L/kg Primary zinc production: 30-60 L/kg (variable by smelter). Recycled zinc: 5-15 L/kg. Water use in rolling/fabrication is minimal. Source: Industry average data
- Recycled content
- 30-50 % Pre-consumer recycled content in architectural zinc: up to 40%. Post-consumer recycled content: approximately 10%. Total recycled content varies by manufacturer and production run. 60% of all zinc produced globally is still in use. Source: VMZINC sustainability data, International Zinc Association
- Renewable content
- 0 % Zero renewable content - zinc is a mined mineral. However, USGS estimates 2.8 billion tonnes of zinc in Earth's crust with reserves effectively stable since 1990 despite 80% production increase. Source: USGS, zinc.org
- Circular score
- 9.0 /10 9.0/10. 100% recyclable without quality loss. 95% of rolled zinc sheet globally is recycled at end of life. In Western Europe, 99% of zinc roofs are recycled. Infinite recycling cycles. High scrap value ensures collection. Deducted slightly for mining impacts and lower recycled content than copper in new production. Source: VMZINC, International Zinc Association, zinc.org
Health & emissions ·1
- VOC emissions
- 0 ug/m3 Zero VOC emissions. Zinc is inert. Source: General material property
Compliance & Fire
Fire performance ·6
- Combustibility class
- Non-combustible (A1/A2) Non-combustible. VMZINC Natural Zinc, Azengar, QUARTZ-ZINC, and ANTHRA-ZINC are classified A1 per EN 13501-1. Coated products (PIGMENTO, VMZ PLUS) are A2 classified but still permitted on buildings over 18 m. Tested to AS 1530.1 (non-combustibility) and AS 1530.3 (ignitability, flame propagation, heat release, smoke release). Source: VMZINC Australia, EN 13501-1, acladding.com.au NCC data sheet
- Fire resistance level
- N/A - cladding element minutes Zinc sheet alone does not provide a fire resistance rating (FRL) as it is non-loadbearing cladding. However, it does not contribute fuel and maintains integrity at temperatures well below its melting point (420 degC). IMPORTANT: zinc melts at a lower temperature than aluminium (660 degC) or copper (1,083 degC), but this is still well above typical fire service temperatures for exterior cladding. Source: NCC 2022, VMZINC fire performance data
- Ignition temp
- N/A - does not ignite degC Zinc does not ignite under normal fire conditions. Zinc powder can be flammable but solid sheet does not burn. Source: VMZINC safety data
- Flame spread index
- 0 Zero flame spread - zinc does not support combustion. FSI = 0. Source: AS 1530.3, non-combustible metal
- Smoke dev. index
- 0 Zero smoke production - zinc does not burn or produce smoke. SDI = 0. Source: AS 1530.3
- Heat release rate
- 0 kW/m2 Zero heat release rate - zinc does not burn or contribute fuel to a fire. Source: AS 1530.1 testing
Cost & Lifecycle
Capex & lead time ·6
- Material cost (range)
- 50-130 AUD/m2 Material cost for titanium zinc sheet varies by finish and thickness. Natural Zinc 0.7 mm: $50-80/m2. QUARTZ-ZINC/ANTHRA-ZINC 0.7 mm: $65-100/m2. PIGMENTO colours: $80-130/m2. 0.8 mm facade grade: $70-120/m2. Prices subject to zinc commodity fluctuations. Source: Australian distributor pricing 2024-2025
- Material cost (per unit)
- 70-100 AUD/m2 Representative mid-range cost for 0.7 mm VMZINC QUARTZ-ZINC or ANTHRA-ZINC, ex-distributor Australia. Source: Australian distributor pricing 2024-2025
- Lead time
- 5-98 days Standard VMZINC coil/sheet from Australian stock (Natural, QUARTZ, ANTHRA): 5-15 days. PIGMENTO colours and special orders: 8-14 weeks (56-98 days) from European manufacture. Custom profile fabrication: 4-8 weeks. Source: Australian distributor estimates
- Lifecycle cost
- 200-400 AUD/m2 Over 100-year life cycle, zinc is competitive despite premium initial cost. Zero maintenance cost (no repainting). LCC approximately $2-4/m2/year. VMZINC BRE EPD uses 100-year reference service life. Salvage value at end of life (zinc scrap). Source: VMZINC BRE EPD, life cycle analysis
- Annual maintenance
- 0.50-1.50 AUD/m2/year Effectively zero ongoing maintenance. Budget $0.50-1.50/m2/year for periodic inspection only. No painting, coating, or cleaning required. One of the lowest maintenance costs of any cladding material. Source: VMZINC life cycle data
- Market availability
- good Good availability in Australia through specialist distributors. VMZINC is the dominant brand with established Australian distribution (Architectural Roofing + Building Supplies, Roofing Supermarket, Industry Cladding). RHEINZINK and elZinc also available. Growing market share in architectural roofing segment. Source: Market assessment
Service life & durability ·3
- Expected lifespan
- 80-200 years Roofing: 80-100+ years (BRE EPD states 100 years). Wall cladding: 100-200+ years (less exposed to weather). Corrosion rate approximately 1-2 um/year in most atmospheres. 700 um (0.7 mm) sheet provides 80-100+ year theoretical life based on corrosion rate. Paris zinc roofs from 1850s-1870s still in service (150+ years). Source: VMZINC BRE EPD, historical building surveys, zinc.org
- Maintenance interval
- 1825-3650 days Zero routine maintenance required. Visual inspection recommended every 5-10 years (1825-3650 days) for mechanical damage, drainage blockages, and sealant condition. No painting, coating, or cleaning needed. Source: VMZINC maintenance guide
- Warranty period
- 20-50 years VMZINC standard material warranty: 20 years (through recommended contractors). Extended warranty: up to 50 years on project-specific basis. RHEINZINK: 30 years standard. elZinc: similar warranty periods. Source: VMZINC Australia FAQ, manufacturer data
Layer D
Where it's used
Standing Seam Roofing
Facade Cladding
Rainscreen Systems
Curved Roofing and Facades
Gutters and Rainwater Systems