Rating System

LEED BD+C: New Construction, LEED O+M: Existing Buildings, LEED BD+C: Core and Shell, LEED BD+C: Schools

Rating System Version

v3 - LEED 2009, v3 - LEED 2008, v2 - Schools 2007, v2 - LEED 2.2

Inquiry

The project is a 43 acre urban development with 8 primary buildings containing roughly 17,000,000 s.f. of space. The LEED documentation for this project will be submitted concurrently as 8 separate submittals, one for each building; however, certain SS and WE credits will be submitted as campus credits as they pertain to the project at large. We are requesting approval to submit SSc7.2 as a campus credit since the SRI requirements have been calculated, and exceeded on a project-wide level. The weighted average roof calculation method described on page 98 of the LEED v2.2 Reference Guide was used to calculate a total weighted SRI of 84 for the project, which exceeds the theoretical SRI of 66 (75% of roof area = SRI 78 and 25% of roof area = SRI 30). In fact, 82% of the total campus roof area has an SRI that exceeds the theoretical SRI value of 66. The following weighted average calculation approach was used to determine the project-wide weighted SRI for all roofing surfaces: (Area of Roof Surface A / Total Campus Roof Area) * SRI of Roof Surface A) + (Area of Roof Surface B / Total Campus Roof Area) * SRI of Roof Surface B) + (Area of Roof Surface C / Total Campus Roof Area) * SRI of Roof Surface C) = Total project-wide weighted SRI Similar to other campus credits, the heat island effect is of campus-wide concern since the ambient air temperature around and above the development is directly affected by the albedo of selected roofing surfaces. By exceeding the SRI requirements for this credit on a campus-wide level, the heat island effect and associated cooling energy loads have been minimized, therefore promoting a healthier environment for the humans and wildlife that inhabit this development. We request confirmation that the proposed strategy to submit SSc7.2 as a campus credit is acceptable to achieve the intent of this credit.