Hello. In our project we have a large underground structure to house an IMAX Theater. Since we're below freatic line, we need to apply in the interior face of the concrete structure an additional water seal (actually a weatherproof product). Since the discussion in the forum I assume that as long as this product in in the interior side and touches the interior air, it need to comply with VOC requirements. But I have a question: That's required even if that there will be more products (finishes) applied over it? It will not be emitting to the air at the operational stage. Thank you.

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Lawrence Lile

Chief Engineer

Lile Engineering, LLC

LEEDuser Basic Member

59 thumbs up

Wed, 06/10/2015 - 03:06

My first thought is yes, it needs to comply. There is a category for Waterproof Concrete/Masonry Sealers that allows 400 g/L VOC - is the product you need to apply worse than that? I am not familiar with design requirements for the freatic line, sounds interesting. Tell us more, I don't come up with a google hit for the word. If the product you need to install isn't compliant with 400g/L, it might be a special circumstance that ideally should be checked out with the LEED review team in a conference call before construction phase. I think you have a strong case that it has to be installed.

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