Word: greening
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...make a green roof, Werthmann and his team used different amounts of Rooflite—a mineral aggregate with a small amount of organic material that is commonly used in green roof projects—in addition to planting seeds and clippings of sedum, a low flowering plant that tolerates the harsh roof conditions well...
...School of Design successfully installs a green roof, Werthmann said that the plants will be able to absorb excess storm water as well as reduce the amount of sunlight directly hitting Gund Hall...
Werthmann has only been able to place two inches of substrate on the roof of Gund Hall—most green roofs require at least four—and only 10 to 20 percent of test areas have sprouted plants...
...effective green roof, plants should cover about 70 to 100 percent of the area, Werthmann said...
Werthmann added that he hopes to create a cost-effective model for installing green roofs, as the high costs of the new green technologies often deters companies and other institutions from retrofitting old buildings...