Patina Timeline: B. Studio Architecture Office

B. Studio Architecture Office in Weathering Steel

Patina Timeline: B. Studio Architecture Office

In the ever-evolving world of architecture, the choice of materials plays a crucial role in shaping the character and longevity of a structure. One material that has captured the hearts of architects–specifically B.Studio Architecture–is weathering steel.  

Not only does weathering steel require minimal maintenance, but the orange-brown patina that weathering steel develops over time makes a statement. Plus, as you’ll see in the photos below, the rustically-beautiful patina color and texture only improve with age! 

About the project

B. Studio Architecture, a boutique architecture firm located in Charleston, South Carolina, selected weathering steel as one of the siding materials for its office building and tracked the changes in the steel’s patina over the course of two years (2022-2024). 

We supplied B. Studio Architecture with 16GA A606-4 weathering steel plasma-burned to size. ASTM A606-4 is a high strength, low alloy specification with improved atmospheric corrosion properties covering hot and cold rolled steel sheet, strip and coil. When properly designed and exposed to the atmosphere, A606-4 can be used unpainted for building facade applications as it is for their office building.  

The patina timeline

Weathering steel is blueish-silver in its original state, but it quickly and naturally develops a patina or rust layer that continues to bond and deepen over time from its original blueish-silver to the sought-after rusty, orange-brown color. 

The rate at which the patina forms depends on the environment the steel is exposed to, such as temperature changes, humidity and proximity to bodies of water. In our experience, the patina forms quicker when the steel is exposed to multiple wet-dry environmental cycles. Likewise, cold-rolled materials (18 GA sheets or thinner) form the patina quicker than hot-rolled materials (16 GA sheets or thicker). The first photo of their office building was taken in February of 2022 right after installation, and the final photo was taken in February 2024. 

Weathering Steel Patina Timeline

As you can see, the patina is ever-changing, becoming a deeper tone and texture over time blending perfectly with the surrounding landscape!  

Contact Central Steel Service For Weathering Steel for Commercial Projects

Are you interested in using weathering steel in your next commercial project? Central Steel Service stocks high-strength, corrosion-resistant cor-ten steel across several categories and in a variety sizes. Contact one of our experienced sales associates to learn more!