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FAQs about MRc4 :

Is the default average recycled content value of 25% for steel still allowed?

Can site materials, such as soil, be included in the MR credit calculations?

Are there recycled content claims that I should be wary of?

Can I count FSC-certified MDF toward both MRc4 and MRc7?

If I have one cut sheet that meets the LEED 2009 requirement to upload 20% of cut sheets by cost, for this credit, is that acceptable?

I have recycled content information for a product, but it doesn’t specify whether it is pre-consumer or post-consumer. What should I do?

The recycled content percentage on the product data sheet is given as a range. What should I do?

The manufacturer can't give me product-specific recycled content data, but they say that they fall within the national industry average. Can I use that?

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NC-2009 MRc4:Recycled Content

How to calculate Percentage of recycled content?

Hello, I need a clarification on how to calculate the percentage of recycled content for a specific material on my project. For example; My fiber glass insulation has 9% post consumer recycled content and 26% pre-consumer recycled content. In my specifications, I need to put the Required recycled content for my fiber glass to meet the final 20% based on cost value to acheive the credit . Is it simply 9 + 26= 35 % or I have to apply equation 1 and 2 in the Guide? If yes, how should I calculate that if the total material cost is 1,223,595$ and the cost of fiber glass is 10,595$. Thank you

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Fri, 10/04/2013 - 21:12

Sahar - The 20% recycled is based on the overall total cost of your materials from Equation 2. Each individual product does not have to meet the 20% requirement. I would specify “recycled content” as a requirement for the fiberglass in your specifications and not worry about exact values. Use Equation 1 in the Reference Guide to get your recycled content value for the fiberglass’ recycled content. You take the recycled content values for all your products (numerator of fraction) and divide that total by the overall cost of materials as outlined in the Reference Guide (denominator of fraction) as shown in Equation 2. It is unfortunate you are a guest and not a member of LEEDuser because you could see our resources, which might help you.

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