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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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Q: Is it necessary to prime plywood floor before installing ceramic tiles?
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Related questions

Can you ceramic tile on plywood floor?

No, plywood alone is not strong enough for ceramic tile. These floors require a very sturdy subfloor at least 1 1/4" thick before the tile. This requires either using cement board or a pored mudbed.


How do you level a floor before installing ceramic tile?

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.


Which is not necessary to do before installing beta software?

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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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What would cause liquid leaking up through grout lines in a new ceramic tile floor?

Improper installation. You must install cement board over the sub floor before you tile. If the tile was glued to plywood which is not waterproof, the plywood will absorb moisture which will cause the grout to crack and deteriorate


Should you remove carpet glue from plywood before laying ceramic tile in sunroom?

If the carpet glue is dense enough to affect your tile cement then you should remove it by sanding. -If it's only sparse then it won't matter.


What was used before Plywood?

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Can you put marble over an old ceramic tile floor?

No, I would try to avoid that at all costs. If you do it, it will crack. It's best to remove the existing tile and smooth out subfloor before installing any tile, and most especially for installing marble which is very fragile.


What should be the maximum humidity at floor level before installing new flooring after a bathroom flood?

Humidity in room under 50%. If it's plywood sub floor moisture level should be below 12 the lower and drier you can get it the better


What is the difference between marine grade plywood and treated and will paint stick to treated plywood?

Marine grade plywood and treated plywood aren't the same thing. Marine grade plywood has special glues and woods that will withstand constant immersion in water. Treated plywood is regular plywood that has been run through a pressure treating cycle. Paint will stick to treated plywood if you make sure to let it dry for a few months before you paint.


Can you lay ceramic tiles over vinel tiles?

It is possible but I would not reccomend it. If possible remove the old tile before laying the new tile. If you want to avoid removing the old tile you can lay a cement board over the old tile before installing the new tile.