Question: Seamus asks: Can you use the same material to earn both MRc3 Materials Reuse and MRc4 Recycled Content? i.e. slate being reused from old chalkboards, slate chalkboards being 100% post consumer recycled content.


Hi Seamus, thanks for your question about LEED Materials and Resources (MR) Credits.

Green Building Materials: LEED MR 3 and MR 4

In short, the answer is no. The LEED for New Construction 2009 rating system states that any materials applied to MRc1.2, MRc4, MRc6, and MRc7 cannot be used for MRc3.

Therefore, the same building materials cannot be used to earn Materials and Resources (MR) Credit 3, Materials Reuse, and MR Credit 4, Recycled Content.cod-newsroom-LEED

This principle is not expected to change in the forthcoming LEED version for 2012.

The United States Green Building Council (USGBC), which develops the LEED rating systems, aims to “transform the way buildings and communities are designed, built and operated, enabling an environmentally and socially responsible, healthy, and prosperous environment that improves the quality of life”.

Therefore, the LEED green building rating system encourages the maximum amount of participation in the process of making green buildings with the highest level of sustainability achieved. Trying to make certain credits do double-duty is to a certain extent an exercise in “cheating the system” without adding any additional quality or sustainability to the project.



Christianna Raber, LEED AP BD+C

Christianna Raber is a DC native, and deeply committed to art, responsible architecture, and the environment. She is a graduate of Massachusetts Institute of Technology, SMArch (2004), Rice University, BArch (2000), BA French (1998), and TJHSST, Governor’s Diploma (1994). Currently an Intern Architect at ForrestPerkins, architects of luxury and boutique hospitality interiors. ForrestPerkins supports a collaborative culture. Known for its inclusive, holistic approach to design, the firm encourages designers and architects to become well-rounded in their knowledge and facility with the other’s discipline.

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