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  1. #1
    Join Date
    Jan 2008
    Posts
    21

    Default Installing fiberock- subfloor

    Hi- if installing Fiberock board as an underlayment for a tile floor, why the need to use thinset to adhere to floor AND screws or nails? I would think screws to the subfloor would be sufficient...

    thanks

  2. #2
    Join Date
    Jan 2008
    Location
    Lakeland ,MN
    Posts
    356

    Default Re: Installing fiberock- subfloor

    Quote Originally Posted by walshke View Post
    Hi- if installing Fiberock board as an underlayment for a tile floor, why the need to use thinset to adhere to floor AND screws or nails? I would think screws to the subfloor would be sufficient...

    thanks
    It helps fill the voids if the floor has low spots. If the fiber board flexes at all after the install the the grout and or the tile will crack. believe me on of my early home improvement tile jobs the grout kept cracking from the floor flexing
    Harry

  3. #3
    Join Date
    Aug 2007
    Location
    The Great White North
    Posts
    4,045

    Default Re: Installing fiberock- subfloor

    Yep .... as Ravens53 said this will also fill any voids between the underlayment and the subfloor.

    Keep in mind if the existing floor structure has "bounce" this won't prevent that. In that case the floor structure needs to be reinforced.
    "" an ounce of perception -- a pound of obscure "
    - Rush

  4. #4
    Join Date
    Jan 2008
    Posts
    21

    Default Re: Installing fiberock- subfloor

    makes sense , thanks guys

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