METAL TYPES: MUNTZ METAL

Warm Character. Enduring Performance.

A Distinctive Architectural Alloy

Muntz Metal is a copper-zinc alloy composed of approximately 60% copper and 40% zinc, with small traces of iron. Part of the brass family, it combines the warmth of polished brass with the rich, evolving character of aged bronze.



Originally developed in the 19th century for marine sheathing and shipbuilding, Muntz Metal has become a distinctive architectural material for façades, roofing, and decorative metalwork where natural patina and long-term durability are desired.

A Living Finish That Evolves With Time

Muntz begins as a bright, golden-yellow surface similar to polished brass. As it naturally oxidizes, the material develops deeper bronze and dark brown tones, sometimes revealing subtle black or olive undertones depending on exposure.



In marine or high-humidity environments, the patina can stabilize into a rich, dark caramel-brown finish, adding both protection and architectural depth.

Muntz Metal Develops a Rich, Naturally Protective Finish Over Time

Muntz Metal begins with a bright golden-yellow appearance and gradually develops deeper, warmer tones as it is exposed to the environment. Unlike pure copper, Muntz does not typically develop a green patina. Instead, its oxidation progresses toward rich bronze and dark brown tones.

Corrosion Resistance & Longevity

Muntz Metal performs exceptionally well in marine and humid climates. Its dense oxide layer provides lasting protection against atmospheric corrosion while allowing the material to age naturally.

Unlike pure copper, Muntz does not develop the familiar green patina. Instead, its stable brown oxidation layer creates a durable, naturally aged appearance with minimal maintenance when properly detailed.

Expected Service Life: 80–100+ Years

Made for Architectural Craftsmanship

The balance of copper and zinc gives Muntz Metal excellent malleability and strength. It can be rolled, formed, welded, or soldered using traditional sheet-metal techniques, making it well suited for detailed architectural fabrication.

Roofing

Standing seam and flat-lock roofing

Façades

Wall cladding and exterior façade systems

Architectural Details

Door panels, column wraps, and interior accents

Ornamental Metalwork

Custom trims and decorative features

Why Architects & Builders Choose Muntz Metal