Our project is a transportation facility currently under design at about 75% contract documents. The project is a single building with a non revenue vehicle/employee parking deck on 85% of the uppermost level (roof), with the remaining 15% being a non-parking, membrane roof area. On a previous CIR (SS 7.2 - 9/24/2001), the upper deck of a parking garage was considered a non-roof impervious surface. Please advise if the following strategy is acceptable to determine if we can achieve the credit requirements for SS7.1 and SS7.2: Strategy: 1. The roof-parking area (85%) will be included in calculations for SS7.1 - non-roof impervious surface area. 2. The membrane roof area (15%) will be the only area in consideration for SS7.2, Energy Star compliant roof.
Yes, per LEED-NC v2.1 CIR ruling dated 9/24/2001 the upper deck of the parking garage must be considered a non-roof impervious surface and included in calculations for SSc7.1. All remaining roof surfaces not used for parking, such as the membrane roof area, must be included in calculations for SSc7.2, with the exception of areas covered by equipment, solar energy panels, and appurtenances. Applicable Internationally.