To achieve MRc4.1, the LEED professional must use materials with recycled content such that the sum of post-consumer recycled content plus one-half of the pre-consumer content constitutes at least 10% (based on cost) of the total value of materials in the project. To achieve MRc4.2, the sum of post-consumer recycled content plus one-half of the pre-consumer content must constitute at least 20% of total materials costs.
Thus, if project contractors purchase $10,000 worth of a wood flooring product with pre-consumer recycled content, and the total value of project materials is $1 million, then project managers can add ½ of the value of that product ($5000) to other recycled-content materials, and the total must equal or exceed $100,000 to gain a point under MRc4.1. To gain the two points offered by MRc4.2 in this example, the total value of recycled-content materials (with pre-consumer recycled-content materials counted at 50% value and post-consumer at full value) must be $200,000.
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Click here for a list of WFRG products that qualify for these credits.