This article was originally published by Common Edge as "How the Restoration of Louis Kahn’s Yale Art Gallery Helped Kickstart Modern Preservation."

I have a distinct memory from my days as an architecture student at the University of California Berkeley in the late ‘80s. During an architectural survey class taught by Spiro Kostof, Louis I Kahn’s Yale University Art Gallery popped up in the slideshow. “Nice building,” I thought, “but what’s with those windows?”

Fifteen years later at Polshek Partnership (now Ennead Architects), I would become the project architect for the construction phase overseeing the rehabilitation of that classic building—the most challenging aspect of which was to replace “those windows.” I came to understand, intimately, how the double-paned window wall had failed almost as soon as construction was complete. Condensation accumulated between the panes, creating the foggy effect that marred my first impression of this groundbreaking building.