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


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?


Polly Osborne, FAIA, LEED AP

Answered by Polly Osborne, FAIA, LEED AP

Los Angeles, CA

Polly Osborne Architects

December 11, 2009

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.

Tagged In: floor refinishing, concrete floors

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