Our LEED site contains multiple buildings for a nature center, which covers a large acreage of land. In order to provide access to outlying buildings, elevated boardwalks are planned to be constructed on helical piers in order to preserve and protect the delicate ecosystems that are part of the site. These boardwalks will be built of composite lumber with gaps between the boards for water to run through. Since the boardwalks are not "impervious" to water, we are assuming that they will be considered pervious and therefore not meet the definition as one of the site\'s "non-roof impervious surfaces" for this credit. Before we proceeded under this assumption, we wanted to receive feedback on the likely outcome of this strategy. FYI: The supplier of the composite wood decking has not completed any ASTM E903 testing on its product to determine its reflectivity.
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