CASE STUDY: NORDSTROM

Nordstrom selected a precast concrete enclosure system, not only for its energy efficiency, but also to capture a diversity of design in one system. The company’s design approach highlights the aesthetic versatility possible with precast concrete.

The precast insulated concrete panels provide edge-to-edge, continuous insulation and serve as the air and vapor barrier, providing a very efficient, high-performance enclosure system. Aesthetically, four different finishes are combined on one panel, creating a multi-layered tone. Formliners are used to offset the horizontal bands at different heights.

The new facade incorporates a varied dimensional projection, furnishing a clean, fresh, white appearance. Entry areas feature 1-inch-thick reveals, producing a ribbed pattern that provides color contrast and dimension. Polishing the outer projections simulates natural stones. The projecting feature wall facade incorporates horizontal bands with four finishes: polished, burnished, acid-etched, and sandblasted. These bands create subtle distinctions within the white concrete panels that project an image of sophistication and elegance, while retaining the traditional durability offered by precast concrete. Acid etching and sandblasting are traditional finishes, but polishing is becoming more popular as architects look for new ways to create beautiful facades more economically. Both polishing and burnishing are created with diamond-tipped pads on either a handheld or machine polisher. The amount of grinding determines the finished look and which term applies. A dull matte finish (honed) is achieved by the least amount of grinding. A high-luster (polished) grinds off the most paste. A mid-range level creates an intermediate finish (burnished).

“The burnished, honed, acid-etched, and polished portions of the panels each reflect light differently when seen from different angles, thus taking on a light and airy quality throughout the day,” notes Michael Lee, principal of Callison, architect of the project. The final design was such a success that it has become the design of choice for Nordstrom’s new stores. “Only through great partnership were we able to create unique mixes, finishes, and designs that surpassed all preconceived notions of concrete and supported the store brand elements,” Lee says. “The combination of horizontal reveals, layers of multiple finishes, and the building’s proportions formed a natural warmth from a modern mass. Artistry truly blended with execution.”

Precast has many finish options. For each texture under consideration, it is important to ask whether the specified finish achieves the durability and aesthetic goals of the project.