• Hometalker
  • Springfield, MA
Asked on Dec 13, 2018

How do I tile a bathroom floor?

JudyKelli L. MilliganJohnavallance82


I have a very small second bathroom. By the tub I lifted up a loose old "vinyl" tile and notice some "dry rot" in the wood underneath. Should I do a subfloor and backer board or just the backer board. It has been over 20 years since the floor was last tiled.

4 answers
  • If you have dry rot, that needs to be fixed before you can proceed. Chances are you need to replace the sub floor and when you take it up, inspect the joists underneath. If those have rotted too, it may be time to bring in the pros to fix first, then proceed with your floor tiling project.

  • Johnavallance82
    on Dec 13, 2018

    Hi Donna,

    Having discovered Dry Rot, you now have to remove all the flooring and investigate the sub floor you cannot see, because you have to get rid of all the dry rot and where ever it is before replacing or renewing your flooring on top ASAP.

  • Kelli L. Milligan
    on Dec 13, 2018

    You need to replace all rotted wood. Put down 3/4" plywood, then thin Set and screw down 1/2" concrete board before you can install tile. Anything less will let the tile crack. Good luck and have fun

  • Judy
    on Dec 13, 2018

    Donna sorry for the damage. You seem to have a good handle on what to do.

    A sub floor is a must. We didn’t do the backer board on the floor. I believe that’s for walls. I could be wrong.

    Obviously, prep makes a huge difference especially getting rid of the damage.

    I hope you share what you’ve done.

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