Expanded metal is typically an aluminium sheet which has been cut and stretched to form a regular pattern of metal mesh-like material (often diamond-shaped). It is commonly used as an architectural facade element to break-up the uniformity of a building.
Expanded sheet is often stronger than an equivalent weight of wire mesh because the material is flattened, allowing the metal to stay in one piece. The other benefit to expanded metal is that it's never completely cut and reconnected, which allows it to retain its strength.
If positioned and orientated correctly, the mesh can provide some UV relief at certain times of the year. The mesh is popular as a facade material to car park buildings for its ventilation properties and ability to let in light.
Incombustible material if aluminium.
Aluminium sheet can be powder-coated or anodised after perforations are punched, to avoid any nasty visible finish edge detaisl. Our project called "The Beehive" located at Smales Farm on the North Shore, used mesh as a solar element. The architect for another project at 132 Halsey Street, Wynyard Quarter Auckland, pushed the boundaries with a bright gold anodised colour for their Penthouse apartments.