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Ceramic tiles are normally laid on a cement base. If the floor has any flexibility at all, the tiles will wind up cracking. But if you do have to install tiles on top of wood, then yes, the wood has to be sealed because the grout is mixed with water, which can damage unsealed wood.

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How can I ensure proper leveling of a plywood subfloor before installing new flooring?

To ensure proper leveling of a plywood subfloor before installing new flooring, you can use a self-leveling compound or plywood shims to fill in any low spots or gaps. Additionally, make sure the subfloor is clean, dry, and free of any debris before installing the new flooring.


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Pour floor leveler (you can buy it at HD or Lowe's) The floor leveler mixes like thin set, but finds its own level with the help of gravity. It works well on a concrete slab that's not level as well as plywood subfloors.


How can I level a floor with plywood?

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Is it necessary to lay backer board before you lay ceramic tile on the floor?

Yes on wood, no on smooth solid concrete


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Sometimes it is necessary to after installing a new software program and before using it the first time.?

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