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Old 05-03-2012, 05:07 PM   #1
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underflooring for porcelain over hardwood flooring


I have existing kitchen that is porcelain tile over luan over hardwood flooring over 1x10 diagonal subflooring. The floor squeaks in some spots and the tiles have cracked over time.
One contractor wants to thinset hardibacker to the hardwood floor and screw it in and then thinset tile to hardibacker.
Another wants to take out luan and tile also and put a mortar bed over the hardwood floor then thinset the tile down.
I am also using the TEC power grout which is a hard grout not flexible. Please give me your feedback!

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Old 05-03-2012, 05:23 PM   #2
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underflooring for porcelain over hardwood flooring


Both really bad plans. You need to do more than that. Are either of these people tile setters?

Will check back later when I have time. In the mean time maybe someone will expand on my comments.

Jaz

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Old 05-03-2012, 06:12 PM   #3
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underflooring for porcelain over hardwood flooring


Nothing you have there now is a sutable subfloor or underlayment for any tile.
Tile board adds 0 floor strength.
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Old 05-03-2012, 09:08 PM   #4
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underflooring for porcelain over hardwood flooring


Joe is right. BTW, your present floor is a royal hack job, nothing was done right.

Don't consider anyone until they wanna;..........

remove everything until they get to the diagonal subfloor.
Repair/replace as necessary, re-fasten at every joists- 2 screws min.
Install new 1/2-5/8" underlayment grade plywood fastened only to the planks.
Install concrete backer into fresh thin set, fasten and tape per directions.
Or, install a membrane such as Ditra.
Install new tiles.

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