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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Total 7 commentsLeave a comment

hi, Emanuel Garcia from Mexico I have the following question regarding the addenda IEQc4.2 Table 1. VOC Limits Applicable id 100001805 01/10/2013, what are the limits of VOC governing our project? we are in a process of certification LEED-HC 2009 v3.0 registered the project in November 2013, Our supplier for polyurethane waterproofing protection of roofs and parking of vehicular traffic, have their products below 250 g / l in the category Waterproofing membranes, but the SCAQMD Rule 1113 limit in his last addendum, on September 6, 2013 disappears this category of waterproofing membranes, and the question is whether we should continue in this category which category would enter the waterproofing membrane? in the definition of rule1113 has seen the waterproofing sealer and concrete waterproofing / measur, but the description does not satisfy what the waterproofing layer between 0.1-0.2 inches thick according to project specifications. At another point, the healthcare reference guide on page 255 "reference table for all IEQ Credit 4 Groups" table which governs our project? and what is the category for waterproofing membrane? thank you
LEED Specialist, U.S. Green Building Council
Hi Emmanuel - LEED-HC exterior waterproofing products should comply with the CARB SCM limit of 250 g/L rather than SCAQMD Rule 1113. Please take a look at the email that I sent you for further for guidance on this.
Lead Architect, HKR Architects, Astana, Kazakhstan, HKR Architects, Astana, Kazakhstan
I am involved in a project which has 3 phases which were developed using LEED V2, which I understand is valid upto 2015 only, when the next version V3 kicks in. Construction completion of Phase 3 of the project may extend beyond 2015. Please can someone tell me if criteria in V3 may apply to the project in that case and create issues for certification? Thanks BIJOY - 703 901 9113
Architectural Design, Sustainability Specialist, SDS Architects, Inc.
There used to be a pdf document released that was tracked for the Reference Guide (V2009) addenda that was so easy to use. It had the old language lined out and the new language highlighted. Does this still exist? I used to keep it on my desktop and referenced it often. I am currently having trouble keeping the information updated and I don't want it to be an issue in review. Thank you.
Sites Technical Specialist, U.S. Green Building Council
Hi Cynthia, These updated files are still available in the Resources section of the website (http://www.usgbc.org/resources/list/addenda). Specifically, we have redlined Rating System files that track all changes made to the credits. We also make correction tables that list all reference guide changes, organized by Reference Guide name and edition. Thank you.
PhD Candidate, Research Associate, NSF Graduate Fellow, Arizona State University
Hi Theresa~ Thank you for the link, but I have a further question. I don't see the Homes Reference Guide Addenda correction table. Does this exist? Thank you for any guidance you can provide.
Sites Technical Specialist, U.S. Green Building Council
Hi Rebekah- There were no Homes Corrections this quarter, only Interpretations (the latest rating system is dated April 2013). Also, Homes clarifications are documented in the actual Homes Rating System file, which can be found here: http://www.usgbc.org/resources/leed-homes-v2008-current-version

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