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walshke
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

Re: Installing fiberock- subfloor
walshke wrote:

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

canuk
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.

walshke
Re: Installing fiberock- subfloor

makes sense , thanks guys

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