LEED Addenda #10231 (https://www.usgbc.org/leedaddenda/10231) effectively stated that extensive roof systems could not count towards SSc5.1 Site Development-Protect or Restore Habitat for v3 - LEED 2009 projects because "Generally, green roofs with less than six varieties of sedum are considered a monoculture and cannot be used to earn this credit." Fast forward to LEED v4/v4.1 the credit language has been modified to state "Roofs can be either extensive or intensive systems." For v4/v4.1 projects, if the sedum mix blanket on an extensive green roof has a variety of adaptive succulents can this area count as groundcover in contribution to habitat area for this credit, provided that project-wide we are meeting all of the vegetation requirements?
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Summer Minchew
Managing PartnerEcoimpact Consulting
LEEDuser Expert
164 thumbs up
February 23, 2021 - 6:01 pm
Responding to my own question with GBCI feedback: Yes, a sedum variety on an extensive roof system does contribute to the credit. Even in the LI you mentioned for earlier BD+C versions, the sedum roof would contribute if it had at least 6 species.
Alexia Anastassiadis
9 thumbs up
May 17, 2021 - 9:47 am
Hi! How did you account for the soil restoration and testing in your green roof? We have a soil test, but no reference soils, since it is a green roof and we can atest that the soil support plant life on it, but it is completeley different from soils in the area.