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If a ceramic tile receives a top coat after it is manufactured, is it exempt from the credit requirements?

While products that are inherently non-emitting sources of VOCs (stone, ceramic, powder-coated metals, plated or anodized metal, glass, concrete, clay brick, and unfinished or untreated solid wood) are considered fully compliant without any VOC emissions testing, a tile or similar product that is coated after being manufactured must meet the credit requirements for flooring product certification.

The credit requirements are allowed to exempt unfinished wood, but wood is almost always finished. This is confusing!

Yes, it is odd. All the same, unfinished wood is exempt and considered fully compliant because it is an inherently non-emitting source of VOCs, while finished wood, whether the finished is applied onsite or off-site, must meet relevant requirements.

Question: 

If a ceramic tile receives a top coat after it is manufactured, is it exempt from the credit requirements?