Can you recommend a non-toxic finish for a concrete floor with radiant heat?

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Can you recommend a non-toxic finish for a concrete floor with radiant heat?

Asked by ANNE MILLER

Last year we installed hydronic radiant heat into the concrete of the floor for our new house. Because we didn't want toxic gas emitted by certain finishes when the heat is on, we opted to seal the floor with a non-toxic, water-based sealant. Over the year, however, the concrete surface has become badly stained and it looks unattractive. Is there a finish that you would recommend that would not off-gas toxic chemicals once the radiant heat is on in the floor? Would carnauba wax work for this purpose? Would we have to do something different to the floor?

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Answers

Polly Osborne, FAIA, LEED AP's picture

I recommend having the floor polished. A polished concrete floor resists stain. There are some warehouses that are now finely polishing their floors instead of applying sealer, because of long term cost effectiveness.