Pre-consumer Recycled Content – (also referred to as Post Industrial Content in older projects prior to LEED v4)  

          Refers to materials that are recycled from manufacturing process waste.  These materials are never part of a viable product sold to a consumer.  They go from manufacturing stream to waste and then back into the manufacturing stream before finally ending up in a product.  LEED requires that certain percentages based on cost are met.  An example of  LEED v4 requirements is:  

MR (Materials & Resource) Credit 4.1 states “Use materials with recycled content such that the sum of post-consumer recycled content plus one-half of the Pre-consumer content constitutes an additional 10% beyond MR Credit 4.1 (total of 20% based on cost) of the total value of the materials in the project.”