- 1. Most buildings in NYC are old and therefore to have an impact on the built environment, older buildings must be included. New building comprise only one to two percent of the building stock. Most of DDC’s work is renovation. The shells of buildings can lost longer than 300 years, while other building materials will change over time.
- 2. Using older and historic buildings, as opposed to construction new buildings, reduces environmental impacts. Over 60 percent of NY’s solid waste is from construction and demolition (C&D) waste, which is greater than in most places due to the old building stock. The City now ships its waste to Pennsylvania and Virginia. The fewer the buildings that are torn down, the less C&D waste is routed to landfills.
- 3. Older buildings tend to be higher quality buildings, due to aesthetics and intelligence of design. The detailing that adorns these buildings is too expensive to do today. The high value of construction is hard to repeat, as well. They were built by Old World, skilled craftsman from Europe.
- 4. Historic buildings have embodied knowledge. These buildings preceded the era of artificial light and mechanical cooling. We can learn from these buildings how to keep buildings cool and use the sun for lighting. The shape of the buildings, U, T, and L-shaped buildings, enables natural light to penetrate the narrow floors. Artificial lighting consumes between 30-50 percent of a building’s energy. Improving natural light penetration could significantly reduce this consumption.
Back to the Future: Greening Historic Buildings – April 21, 2004
John Krieble and Laurie Kerr, of the Office of Sustainable Design (OSD) at NYC’s Department of Design and Construction, discussed the close relationship between sustainability and preservation. The speakers focused on two historic buildings that are also OSD pilot green renovation projects. One, the ACS Bellevue by McKim, Meade, and White, is on the National Historic Register. The other, the old Lion House at the Bronx Zoo, is a New York City Landmark, which will achieve at least LEED Silver and perhaps Gold.
The New York City Department of Design and Construction is “bringing together the two most powerful movements in architecture of the past generation: preservation and sustainability,” according to John Krieble and Laurie Kerr at DDC. DDC is a city’s mayoral agency in charge of much of the city’s architecture including all building types that the city owns, excluding schools, hospitals, and water treatment plants. The agency has a $1 billion capital construction budget, one-third of the city’s structure budget.
In 1997, DDC added the Office of Sustainable Design, a consortium of professionals, and created the High Performance Building Guidelines. DDC has used the guidelines for 21 pilot projects at this point, worth $800 million of construction. DDC then further studies the lessons learned from these pilot projects are used to implement agency wide practices that improve the environmental sensitivity of buildings at no extra cost. (More information on the guidelines can be found at DDC’s home page.)
John Krieble and Laurie Kerr highlighted four reasons the City should green historic buildings.