Rubigo is a weathering steel which is principally used in facade cassettes.
After exposure outdoors to rain and wind, an even, dense oxide layer (patina) is formed on the surface of the steel. The layer impedes further access of moisture from causing further corrosion. The steel is resistant to high temperatures and does not alter in size as much as standard steel due to variations in temperature. Furthermore, it does not rust as fast as standard steel.
The material produces a beautifully patinated surface which requires minimum maintenance over the years. The rusted brown surface is trendy and easy to combine aesthetically with other colours and materials. Rubigo's rusty surface fits well with other natural materials such as stone and green vegetation.