Metals

Copper.

Copper is an expensive material with a moderate CO₂ footprint, but its extremely long lifespan and full recyclability make it a good lifecycle choice for historic buildings.

Key Figures

Carbon Footprint (GWP): 3.5 kg CO₂-eq/kg
Density: 8900 kg/m³
Expected Lifespan: 100–200+ år

What is copper?

Copper is a classic roofing metal and installation material with extremely long lifespan. Used for roofing, gutters, plumbing, and electrical cables. Copper forms a characteristic green patina (verdigris) over 10–20 years. Carbon footprint is moderate, and copper is fully recyclable.

Carbon Footprint Compared

Zinc 3.1 kg CO₂/kg

Copper ← this material 3.5 kg CO₂/kg

Stainless steel 5.5 kg CO₂/kg

Aluminium 8.24 kg CO₂/kg

Negative carbon footprint (green) indicates carbon storage. Data based on EPD averages from ECO Platform and estimates per EN 15804.

Typical Applications

check_circle Roofing (copper standing seam)
check_circle Gutters and copings
check_circle Plumbing (pipe work)
check_circle Electrical installations (cables)
check_circle Facade cladding on public buildings

In Renovation

Copper is used in renovation for replacing copper gutters and flashings on historic buildings. Old copper has high scrap value and is easily recycled.

Questions about copper

Is copper very expensive?

Copper is one of the most expensive building materials — especially for roofing. The price fluctuates with raw material prices and is typically 3–5x more expensive than zinc per m². However, lifespan is markedly longer.

Does copper runoff affect the environment?

Copper compounds in rainwater can at high concentrations affect aquatic organisms. Modern copper roofing typically has a zinc foil underside that reduces runoff. In natural water environments, concentrations are normally low enough.

What is the copper patina and can it be preserved?

The patina is a natural protective oxidation process — copper oxidises into copper carbonates (verdigris). It protects the copper surface and gives historic appearance. The patina cannot be chemically accelerated and should not be removed.

Can copper pipes be replaced with plastic?

Yes — PE and PEX pipes are increasingly used for hot water installations. They are cheaper, lighter, and have lower CO₂. However, copper is still better for hot water (biological growth and flexibility).

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