As part of its weekly Pulse video podcast, RiverWired has produced a video about green roofs in New York City. The video focuses mainly on the green roof at Silvercup Studios in Long Island City, which is the largest green roof in the city. Leslie Hoffman from Earth Pledge (which is overseeing the installation of a green roof at the former Gratz Industries Building in Long Island City) provides details about how her team is tracking the roof’s performance. The podcast also offers a good overview about how a green roof is physically put together.
A September 2006 article in Metropolis magazine cites the following green-roof statistics:
- Fraction of U.S. energy that goes toward cooling buildings: one-sixth
- Temperature of a conventional-roof membrane on a 95° F day: 158° F
- Temperature of a green-roof membrane on the same day: 77° F
- Heat loss of green roof as compared with conventional roof: 18% less
- Stormwater-retention rate of green roof as compared to conventional roofing material: up to six times greater
- Increase in sound insulation of a building: up to 8 decibels (ten decibels represent approximately twice-loudness).
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