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Question from B. C.

Thanks to all your tips, my wife is really feeling much better with her MCS. In fact, we’re now carefully considering putting a tile floor where the carpet used to be in the bathroom adjacent to her bedroom. Using your recommendations we have found safe tile adhesives and grout sealers but we can’t find anything about safe grouts.

Can you recommend any products for a chemically safe grout and are there any problems to watch out for in the cement board underlayment materials?

 

Debra’s Answer

Grouts can have additives that that can off-gas.  Safer brands include Mapei and Summitville-700.

The standard cement board underlayment is fine. Two brand names we have used are Hardibacker and Durock. There is also Wonderboard, which was the first product of this kind.

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