Building owners can do the work themselves, or they can engage Cool. New York City is trying to coat a million square feet of roof a year. A study conducted by Columbia University and City University of New York of three test roofs built by Con Edison in Queens found that the green roof - an extensive roof, planted with sedum - cut the rate of heat gained through the roof in summer by 8.Īnother study (same researchers, same Con Ed test sites) found that green roofs are a very cost- effective way to reduce storm water runoff. They retain rainfall, and what does run off is delayed until after the waters have peaked. Plants reduce sewer discharge in two ways. But because the vegetation is thicker, it will do a better job of cooling a building and collecting rainwater. An intensive roof - essentially a garden, with deeper soil and plants that require watering and weeding - can double that. Next is a lightweight soil (Chicago City Hall uses a blend of mulch, compost and spongy stuff) and finally, plants.Īn extensive roof - less than 6 inches of soil planted with hardy cover such as sedum - can cost $1. Over a black roof - flat is easiest but sloped can work - goes insulation, then a waterproof membrane, then a barrier to keep roots from poking holes in the membrane. So the difference between a black tar roof and a green roof was at minimum 5. The surface temperature of the green roof varied between 9. The year before, a section of the City Hall roof had been painted white.Īnd much of the roof of the building, and the adjacent Cook County building, had become a garden - 2. Eleven stories up, on the roof of City Hall, the surface temperature of the black tar measured 1.īut Mayor Daley, environmental innovator - yes, that Mayor Daley - had done something interesting. When sewers back up, polluted water runs into our lakes and oceans, closing beaches. It doesn’t take much to overload New York’s sewers - it can take only 2. The other problem is storm water runoff.Ībout every other rainfall in New York, sewers flood and back up, discharging their mix of rainwater and wastewater into the city’s waterways. For a few people every year, the heat is more than a discomfort - it’s fatal. All are green in one sense.īecause cities have lots of dark surfaces that absorb heat and relatively little green cover, they tend to be hotter than surrounding areas - the average summer temperature in New York City is more than 7 degrees hotter than in the Westchester suburbs. A co- op in Manhattan with a roof garden. Now both have gone gourmet: for roofs, the choices are white, green, blue and solar- panel black. Roofs, like coffee, used to be black tar. Escolha do terreno : Priorizar terrenos j. Costuma dar bons resultados.ģ0 LA PLAgA / THE PLAgUE. Uso de produtos e tecnologias ambientalmente amig.
Aproveitamento passivo dos recursos naturais.
#30 planos de casas prototipo pdf download
Shockingly Simple Electrical for tiny houses! Download 30 FREE DIY cabin plans and have your.
In is a novel of vampire fiction by Swedish writer and.Transforma terrenos degradados em infraestrutura verde. Tira partido do clima e do entorno para reduzir o consumo de energia e de.
0 kommentar(er)
