The next big thing in green building design might be to turn an existing idea on its side. PNC Financial Services Group Inc. recently installed a green wall the size of two tennis courts on one side of its headquarters
Like green roofs — their perpendicular counterparts — green walls are covered in vegetation and provide the benefits of natural insulation and removal of air pollutants. PNC, which provides banking and wealth management services, estimates it will be 25 percent cooler behind the wall than the ambient summer temperatures.
Green walls also can be visually engaging.
The PNC wall features more than 15,000 ferns, sedums, brass buttons and other plants that create a swirling pattern of varying hues of green above the company’s logo. They are divided among hundreds of 2-by-2-foot aluminum panels that were anchored onto the building’s frame after part of the granite facade was removed.
“We think it’s the right thing to do for our community, for our customers and our shareholders,” said Gary Saulson, head of corporate real estate for PNC. “We wanted to add greenery to an area that didn’t have any. … We really view the green wall as public art.”
