In scenarios 1 and 3, where no vegetation covered the roof,the heat gains over the roof are similar in the summer typical week. On average, 0.442 GJ heat was gained through the roof. In the original green building, where a part of the roof is covered with green vegetation, the heat gain through the roof is 24%lower than the bare roof (in scenarios 1 and 3). In scenario 2,where the entire roof is covered with green vegetation, the heat gain through the roof (0.141 GJ) is merely 32% of the heat gain in scenario 1