Solarban R100/Bronze Glass Helps Charlotte’s Capitol Towers Earn LEED Gold
August 3, 2020
Inspired by classical pavilion architecture, using Doric Order and monumental half-round column design, Capitol Towers in Charlotte, North Carolina, is a new office building combining old-world Roman influence with high-performance glazing and modern energy efficiency. The façade, designed by LS3P in Charlotte, showcases concrete pillars and a prominent glass facade, glazed with Solarban R100 on Bronze glass by Vitro Architectural Glass.
Hoping to achieve LEED 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 coloration complemented the overall building color palette and its performance was vital to helping us attain LEED Gold certification,” says 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 code dictates the use of clear glass. Solarban R100 glass advances the structure’s energy efficiency ambitions by uniting a solar heat gain coefficient of 0.23 with visible light transmittance of 42 percent.
The structure also was designed for visibility. A coffered dome, functioning as a mechanical screen, tops off the building off at a height of 200 feet. With an exterior reflectance of 32 percent, Solarban R100 on bronze glass delivers a natural aesthetic that harmonizes 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,” says 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.”
Photography by Tom Kessler
Source: Vitro Architectural Glass