Sandwich panels with weathering steel envelope create a unique architectural aesthetic and ensure maximum energy efficiency of the building.
In 2021, the Finnish company Ruukki introduced Patina sandwich panels with mineral wool core, the outer facing is made of Cor-Ten, and the inner one is made of polymer-coated steel.
Patina sandwich panels have a patented lock shape that prevents internal corrosion at the joints.
Ruukki Patina provides the building facade a spectacular appearance that changes color over time from silver at the delivery time to rich brown in a few years. This property of Corten steel creates a “live” facade that attracts attention. The rich rusty-brown color with the aging effect goes well with glass, concrete and green surroundings.
Cor-Ten steel does not require maintenance and has a long service life. Due to the ability to form a new oxide film (patina) on the surface of the steel, owners can save on the operation of the building, as the surface independently restores the scratched surface without the need for repair or painting. The high quality of steel and mineral wool ensures the durability of Patina sandwich panels for more than 50 years without the need for special care.
Corten panels meet the highest environmental criteria, which allows the building investor to receive more points when certifying under the LEED and BREEAM systems.
The unique properties of Cor-Ten sandwich panels give the building elegance and timelessness, also distinguish it from many other commercial objects in the area.
The customer wanted to create a building that would respect the heritage and refer to the colors of the facades of the historic brick buildings area. As the result a modern, functional building was built, that meets high requirements for tightness, fire safety and durability.
Patina sandwich panels ensure a long service life of the building and reduce its carbon footprint. Thanks to their excellent tightness, the panels increased the energy class of the building and made it possible to save costs up to 30% on heating and air conditioning, which is very important for large sports facilities.
The building is heated using geothermal energy and is built of sandwich panels with maximum thermal insulation. The architecturally bright Cor-Ten facade attracts attention, which is an important advantage for tenants of the facility, which is located along the motorway.
Ruukki Patina sandwich panels give the building elegance, which naturally blends into the environment.
The facade of the office part, made of Patina sandwich panels, brightly highlights the building and harmoniously blends into the environment with green surroundings. The rich orange-brown color of the panels contrasts perfectly with the gray tones of the production and warehouse part of the facility. The building uses a unique solution – Cor-Ten arched wall corner sandwich panels.



