LEED Addenda Update: October 2013 | U.S. Green Building Council
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Published on
Posted in LEED
Published on
Posted in LEED

Quarterly interpretations and addenda to the LEED 2009 rating systems and reference guides are now available. Use the credit library to access updated rating system language and interpretations.


This quarter, we published 13 new LEED Interpretations (#10283-10291, 10293-10296). Highlights include:

  • Using use ethanol as an efficient alternative fuel
  • Desalinated seawater applied as a non-potable water source
  • For EAp2, considering the unregulated load separately from the ASHRAE 90.1 energy model
  • What is considered “hybrid” heating
  • Documentation paths for MRc7. Certified Wood
  • VOC limits of CARB 2007, SCM for Architectural Coatings
  • The use of a photoionization detector instrument to measure TVOC concentrations

26 Interpretations were modified for new notes, updated rulings, etc. Those 26 inquiry numbers are: 731, 998, 1701, 1834, 1902, 2021, 2219, 2283, 2310, 5177, 5217, 5222, 5460, 10024, 10039, 10062, 10091, 10097, 10117, 10165, 10211, 10212, 10214, 10220, 10256 and 10279. Multiple Homes Interpretations were also updated for Midrise credit applicability. 

Access LEED Interpretations »



We published 17 Corrections (#100001789 - 100001805), including:

  • Revised metric equivalencies
  • The addition of Option 3 in Retail NC, EAc5 Measurement and Verification
  • Updated Table 1. in Retail NC, EAc1 Optimize Energy Performance
  • Removed “two points” requirement in Healthcare, IEQc8.1 Daylight and Views- Daylight


Three new supplemental guidance documents (WE Seawater Guidance, EAc1 Table 1, IEQc4.2 Table 1) were published, and one existing document (IEQ Space Type Matrix) was updated. All supplemental guidance documents can be found in the Resources section of the website. 

Project teams are required to adhere to rating system corrections and LEED Interpretations based on LEED registration date. It is strongly recommended that project teams follow reference guide corrections.


The applicability matrix was introduced after the release of LEED 2009 to clarify how each Interpretation applied to the growing suite of LEED Rating Systems and versions. With this quarter’s Addenda release, we are taking a slightly different approach. Each Interpretation now includes a list of the credits that it applies to in place of the full matrix. 

If a credit that a project is attempting is listed as applicable, the team must review the interpretation and apply it if it makes sense to do so. LEED project teams can choose to reference LEED Interpretations that do not list their credit as applicable if the project team believes it is appropriate. A final determination will be made during the certification review.


Last year at Greenbuild, USGBC released the LEED for Existing Buildings: Operations & Maintenance Recertification Guidance document – a tool for projects that have certified using LEED for Existing Buildings and are now ready to recertify. Throughout 2013, we are collecting feedback on the guidance from projects that are in the process of recertifying. Based on that feedback, we issue quarterly updates – the third quarter update is available now.

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