Located along the Charles River in Watertown, Massachusetts, 66 Galen Street stands as a clear example of how architectural ambition and glass engineering must work hand in hand. Designed by Elkus Manfredi Architects, the 224,000-square-foot Class A life science building combines research spaces with wellness amenities, retail areas, and shared lounges, many of them oriented to maximize river views.

A defining element of the façade is the use of 231 custom glass fins, each more than 13 feet tall and fabricated from 13/16-inch low-iron glass laminated with SGP. Manufactured by  Guardian Glass, fabricated by  Press Glass Inc., and installed by Sunrise Erectors, the fins were conceived as both an architectural and environmental feature, providing solar shading while preserving transparency.

Originally intended to shade the south and east elevations, the fins help occupants keep interior shades raised longer during morning hours, maintaining visual connection to the surrounding park and river. However, their slender geometry introduced significant fabrication challenges. Long, narrow fins are especially sensitive to distortion during tempering, making bow control and optical quality critical.

Press Glass addressed this by refining furnace recipes and introducing enhanced quality-control procedures. Each fin was measured using inline scanners and manually inspected to ensure distortion limits were met. Full-scale mock-ups were also produced and reviewed on site, allowing installation tolerances and visual expectations to be confirmed early.

Midway through design, the project faced another challenge when the originally specified glass coating was discontinued. Working closely with Guardian Glass, the team evaluated alternatives through physical mock-ups, ultimately selecting SunGuard® SNR 50, paired with IS 20 in select areas to meet New England’s stringent U-value and solar-control requirements.

The result is a façade that balances aesthetics, performance, and constructability. Installation progressed smoothly, with minimal replacements required, none related to fabrication quality. The project underscores the importance of early collaboration, precise engineering, and clear communication across architects, glass manufacturers, fabricators, and installers when delivering complex, high-performance façades.