San Rafael, California, USA
BŌK Modern, a pioneer in the design and development of integrated architectural metal systems, is excited to introduce Cor-Ten weathering steel facade solutions.
As the demand for durable, low-maintenance, and sustainable building materials continues to grow, the company’s newest solution is quickly emerging as a leading choice for architects and designers seeking performance, aesthetics, and cost-effectiveness.
Cor-Ten Steel by BŌK Modern, won a 2025 Good Design Award from The Chicago Athenaeum: Museum of Architecture and Design and European Centre for Architecture, Art, Design, and Urban Studies.
Unlike traditional painted metals, as it weathers, Cor-Ten steel develops a protective rust coating that not only enhances its aesthetic appeal but also prevents further corrosion.
Unlike other materials that require regular upkeep, the material naturally patinas over time, eliminating the need for ongoing maintenance and recoating.
Additionally, Cor-Ten steel is stronger than aluminum, maximizing material usage while maintaining structural integrity.
The lack of need for additional treatments makes Cor-Ten one of the most economical options available while still delivering a striking look.
In addition to affordability, Cor-Ten steel offers a greener alternative to traditional materials.
Many aluminum panels require Kynar paint coatings, a process that has a significant environmental impact. Cor-Ten steel, by contrast, does not.
Unlike composite metal panel systems, Cor-Ten steel is easily fabricated, curved, and laser-cut to create intricate patterns or shapes unique to site conditions and design intent.
Additionally, BŌK Modern’s mounting methods are integrated directly into the panels, often eliminating the need for additional support structures, reducing both material use and labor costs.
The inherent strength of steel enables the integration of structural folds into the panels, reducing the need for secondary steel supports and allowing for long-span applications.
Laser-cut openings can be incorporated seamlessly into façades, allowing for airflow while maintaining a sleek appearance.
While Cor-Ten steel’s patina evolves naturally in response to environmental factors like humidity and rainfall, rust drips can occur in the initial months of exposure.
However, solutions exist to mitigate this common concern. Integral gutters can be designed at the base of panels to channel runoff to storm drains or planter areas, while strategically placed gravel or landscaped zones can help absorb and manage any dripping, keeping surfaces clean and visually appealing.
Project: Cor-Ten Steel
Designers: Russ Naylor, Alan Beirne, Travis Grossman, Alex Anaya, Max Gardiner, and Ian Tomitch, BŌK Modern
Manufacturer: BŌK Modern
