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        Ceramic over a wood subfloor Sign In/Join 
        posted
        I am redoing two bathrooms on the second story of my home. My husband is very concerned about putting ceramic or porcelain tile over a wood subfloor thinking it will or the grout will crack in no time. Any thoughts or suggestions?
         
        Posts: 2 | Location: United States | Registered: Jan 14, 2014Reply With QuoteReport This Post
        Picture of Jaybee
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        He is right to be concerned. A wood floor will wick out lots of the moisture in thinset, causing it to become a dryer mix than can pop the tile loose.

        Install some form of tile backer material on top of the wooden subfloor. This can be 1/4" or 1/2" concrete board or a Kerdi subfloor liner. These liners will isolate wood subfloor movements from the tile and also provide a perfect surface for the tile to bond to.


        Jaybee
         
        Posts: 10429 | Location: Knoxville, Tennessee | Registered: Sep 27, 2003Reply With QuoteReport This Post
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        With concrete backerboard the ceramic or porcelain should work (assuming floor joists and subfloor are adequate). I did this ten years ago and no problems.
         
        Posts: 1004 | Location: Alabama | Registered: Sep 28, 2003Reply With QuoteReport This Post
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