Form · 0.6 mm
Laminate — indicative fig. C·19
Fire A2 - Limited combustibility Non-combustibleEmbodied carbon 4.10kgCO₂e/kg Medium–highCompressive 280-350 MPaMPa StructuralDesign life 75yr Durable
Lead-coated copper sheet (ASTM B101) for roofing/flashings. Copper base properties: density ~8.89-8.92 g/cm?, thermal conductivity ~397 W/m?K, specific heat ~385 J/kg?K and CTE ~17 x 10^-6 /?C.
01 Physical
Density 8.89-8.92 g/cm? (copper base; lead coating adds slightly)kg/m³
Specific gravity 8.89-8.92
Porosity <1%%
Water absorption 0%%
Hardness 54 minimum Rockwell F
UV resistance Excellent (Class A)
Chemical resistance Excellent to acids/alkalis pH 3-12
pH tolerance 3-12
Surface roughness Ra 0.8-2.5 μmµm
02 Mechanical
Tensile strength 200-250 MPa (annealed copper)MPa
Compressive strength 280-350 MPaMPa
Flexural strength 200-250 MPaMPa
Shear strength 172 MPaMPa
Poisson's ratio 0.34
Impact resistance 130-161 J (Charpy V-notch)
Creep resistance Excellent below 150°C
03 Thermal
Thermal conductivity 390-400 W/m·KW/m·K
Specific heat 380-390 J/kg·KJ/kg·K
Thermal expansion 17-19 × 10⁻⁶/°C×10⁻⁶/°C
04 Compliance & Fire First question
Combustibility class A2 - Limited combustibility
Fire resistance level Non-combustible base, A2 composite
Ignition temp Not applicable - Non-combustible°C
Flame spread index 15-25
Smoke dev. index 50-150
Heat release rate <50 kW/m²
05 Sustainability & Health
Embodied carbon 4100 kg CO₂-eq/metric ton
Carbon footprint 4.2-4.5 kg CO₂-eq/m²
Embodied energy 47 GJ/metric tonMJ/kg
Water footprint 2100 m³/metric tonL/kg
Recyclability 85-90%%
Recycled content 20-40%%
Renewable content 0%%
Circular score 7/10
VOC emissions 0 g/L
Toxicity rating High - Lead content
LEED contribution 3-6 points
06 Durability · Cost · Logistics
Expected lifespan 75-100+ years
Maintenance interval Annual inspection, 5-10 year cleaning optional
Warranty period 20 years typical, 100 year expected
Material cost (range) $45-85 per m²
Material cost (per unit) $450-850 per 10m² sheet
Lead time 2-4 weeks standard, 6-12 weeks custom
Lifecycle cost $1.70-2.20 per m² annually over 75-100 years
Annual maintenance $0-200 typical residential
Market availability Limited - Specialty suppliers
07 Assessment
Advantages
- Exceptional lifespan 75-100+ years
- Superior marine corrosion resistance
- No green staining on masonry
- Develops protective gray patina
- Excellent UV resistance
- 100% recyclable materials
- Performs across all climate zones
- Self-healing minor scratches
- Low thermal movement
- Heritage authenticity
Constraints
- Lead toxicity hazards
- Stringent safety requirements
- High disposal costs as hazardous waste
- Prohibited for water catchment
- Incompatible with zinc/aluminum
- Requires specialized contractors
- Higher installation costs
- May 2026 regulatory restrictions
- Insurance liability concerns
- Limited availability
08 Applications
A1 Heritage building roof restoration
A2 Historic cupolas and domes
A3 Traditional standing seam roofing
A4 Architectural flashings and valleys
A5 Period-authentic gutters and downpipes
A6 Church and cathedral roofing
A7 Museum and gallery restoration
A8 Government building conservation
A9 Custom architectural features
A10 Marine environment 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.