The National Academy of Sciences in Washington, DC, enlisted the help of Quinn Evans Architects to provide new stone flooring that complemented and enhanced the existing stonework found in this 1927 historic building. The flooring was provided in the major circulation spaces — which included large enclosed courtyards and very wide corridors — accents around the perimeter of carpeted conference rooms, bases of walls in both stone flooring and carpeted areas, and placed in areas where original stone had been removed.
Several different stones were used to achieve this goal. Vermont Verde Antique marble from Vermont Verde Antique International and Unfading Green slate from Vermont Structural Slate were used as new flooring in multiple locations and to restore the flooring in the East Gallery. The Vermont Verde Antique — which is referred to as a marble, but is technically a serpentine — was selected to match the existing stone from additions completed during the 1960s.