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NC-2009 MRc4:Recycled Content

Cullet as recycled material in glass

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Mariah Grife
Walsh Construction
LEEDuser Basic Member
6 thumbs up

I have worked on LEED v2.1 projects before where recycled content of glass was rejected due to the cullet present in recycled glass not being allowed to be counted as "pre-consumer" recycled. Is this still true in LEED 2009? Or are they now accepting glass cullet as recycled material?

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Fri, 01/25/2013 - 17:37

Cullet does not automatically means the cullet was generated in the same manufacturing process. Cullet is the word use for ground up recycled glass that is ready for remelting for use in a new manufacturing process. Wikipedia mentions cullet as part of the topic for Glass Recycled: http://en.wikipedia.org/wiki/Glass_recycling The v2.1 reviewers who denied cullet as recycled content did not understand what glass cullet is. They apparently thought it was material left over and reused in the same process.
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Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Fri, 01/25/2013 - 18:06

Check that it's not cullet being fed from the end of a production line (as waste in the production process) back into the beginning of the same line. Note in your documentation the source. If you can do that, I would be surprised to see it rejected, and would challenge the review comment.
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Mariah Grife
Walsh Construction
LEEDuser Basic Member
6 thumbs up

Wed, 01/30/2013 - 21:23

Thanks you guys for the help! One more thing - would this be listed as "Post-Consumer" or "Pre-Consumer?"
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LEEDuser Expert
472 thumbs up

Thu, 01/31/2013 - 00:25

It depends on the source of your recycled glass. Does it come from bottles collected in a recycling program? Then it would be post-consumer. Or is it glass collected from another manufacturing process used by your manufacturer in their process? Then it would be pre-consumer (aka post-industrial).
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Julie Unitas Giba
Concierge Manager
Vitro Architectural Glass
LEEDuser Basic Member
0 thumbs up

Thu, 09/05/2019 - 13:15

Cullet is a valuable feedstock that is not intended for discard or disposal. The reutilization of cullet is necessary to optimize the manufacturing processes to reduce waste, energy consumption, and raw material acquisition. Therefore, Vitro does not report post or pre-consumer recycled content in our architectural glass.

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