Word: tested
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...Harvard Graduate School of Design removed 3,750 pounds of gravel from the roof of Gund Hall and replaced it with different amounts of organic substrate on Friday afternoon to test different cost-effective methods of green roof retrofitting...
...test plots the team has examined thus far have not yielded strong results and thus do not have the potential to increase the building’s energy efficiency, Werthmann said...
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...
...team will periodically add fertilizer and measure plant coverage throughout the summer to assess the success of the new test plots, said Julia K. Africa, Werthmann’s research assistant...
...this roof as really a test roof—it’s not a commercial product,” Werthmann said...