LEED AP with Operations and Maintenance (O+M ) Practice Exam

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What percentage of roof surfaces must be covered with vegetation for the project to earn exemplary performance for Heat Island Reduction - Roof?

80%
90%
95%
100%

The correct answer is: 95%

To achieve exemplary performance for Heat Island Reduction – Roof, a project must have a minimum of 95% of its roof surfaces covered with vegetation. This requirement is established to promote significant reductions in the heat island effect, thereby enhancing the overall environmental performance of the building. In the context of LEED certification, exemplary performance credits are awarded for going above and beyond the standard requirements. Here, covering 95% of the roof with vegetation not only mitigates heat absorption but also contributes to increased biodiversity and habitat creation, improved stormwater management, and enhanced energy efficiency. The percentages below 95% do not qualify for exemplary performance, as they do not meet the heightened standards set for such acknowledgment. Thus, while lower percentages can still contribute positively towards heat island effect reduction, they do not reach the threshold necessary for exemplary credit.