Vitro Architectural Glass helps Charlotte’s Capitol Towers earn LEED® Gold

Classically designed Roman façade enables modern daylighting, energy efficiency

Inspired by classical pavilion architecture, using Doric Order and monumental half-round column design, Capitol Towers in Charlotte, North Carolina, is a newly iconic office building combining old-world Roman influence with high-performance glazing and modern energy efficiency. The ornate façade, designed by LS3P in Charlotte, showcases concrete pillars and a prominent glass facade, glazed with Solarban® R100, a neutral-reflective low-e glass with an excellent solar heat gain coefficient, on Bronze glass by Vitro Architectural Glass.
Slated for LEED® (Leadership in Energy and Environmental Design) certification at the Gold level, the design prescribed preferential parking for low-emission vehicles, smart HVAC and air filtering systems and solar control low-e glazing.

“We chose Solarban® R100 glass because its bronze colouration complemented the overall building colour palette and its performance was vital to helping us attain LEED® Gold certification,” said Jim Williams, vice president and studio leader for LS3P. “Even with the classical design, we achieved a 60/40 glass-to-solid-wall for the overall facade.”

A mixed-use structure, Capitol Towers includes 470,000 square-feet of office space, a seven-level, 1,700-capacity parking garage and 30,000 square-feet of retail space. To minimize local impact and attract progressive businesses, energy efficiency and sustainability were major design considerations.

1st Choice Glass of Monroe, North Carolina installed floor-to-ceiling windows fabricated with Solarban® R100 glass throughout the building, except for the street-level windows where local building codes dictate the use of clear glass. Solarban® R100 glass advances the structure’s energy efficiency ambitions by uniting an excellent solar heat gain coefficient (SHGC) of 0.23 with visible light transmittance (VLT) of 42 percent.

The structure also was designed for visibility. A coffered dome, functioning as a mechanical screen, tops off the building at a height of 200 feet. With an exterior reflectance of 32 percent, Solarban® R100 on bronze glass delivers a natural aesthetic that harmonizes beautifully with the concrete exterior while affording views of Charlotte’s Carnegie District of SouthPark.

“The high-performance, energy-efficient, windows at Capitol Towers allow for an abundance of natural light to fill the space without the radiant heat gain from the sun,” said Patrick Stark, vice president and director of energy and sustainability for property manager Lincoln Harris. “The windows allow tenants to keep their blinds open and connect with the outdoors without sacrificing comfort or energy efficiency.”