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Old 07-19-2012, 10:41 PM   #1
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I have .5 plywood and .25 cement board. The grout is always breaking and the tile gets loose, i all ready try the original cement thats use for tile and readyset premixed mastic adhesive and still get same result. This is only happening in one sectio of the living room. Is there any other type of glue thst i can used i was even thing of replacing the grout for caulking.

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Old 07-19-2012, 11:15 PM   #2
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Quote:
Originally Posted by troylee500
I have .5 plywood and .25 cement board. The grout is always breaking and the tile gets loose, i all ready try the original cement thats use for tile and readyset premixed mastic adhesive and still get same result. This is only happening in one sectio of the living room. Is there any other type of glue thst i can used i was even thing of replacing the grout for caulking.
Troylee500, you will have to give us your numbers in inches to better help you.
But other then that mastic tile glue is not recommended for floor tile.
Did you lay the cement board in thinset + screwed and mesh tape the seams?... Cement board hold no structure for tile so we need to start with what you have as joist size, joist span and how much wood you have over the joists.

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Old 07-23-2012, 04:18 PM   #3
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Is 2'12' area the tile size is 12"12". The people that installed the floor they only used screws. It dotn have mesh tape on seams.
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Old 07-23-2012, 04:35 PM   #4
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Did they use mastic or thinset? You can't use mastic on floors.
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Old 07-23-2012, 06:17 PM   #5
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It's needs to come up you said 2' feet by 12' feet? They might of cut steps for that section
But it sounds like they didn't put cbu in thinset if they didn't tape the seams therefore the installer would have thought the cement board is what hold structure for tile >~^WRONG!*^%*

Post some pics of your demo. If you leave it it will continue to grout crack.

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Old 07-23-2012, 07:10 PM   #6
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These are the pictures
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Old 07-23-2012, 07:39 PM   #7
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Quote:
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These are the pictures
Yeah that's not cool, it's hard to tell but they Look like sheetrock screws in that cement board?
And the fact that you can still see the screws eeek!
That hole floor might be a hack job

Did you try mixing thinset? And using that?

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Old 07-23-2012, 07:52 PM   #8
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Ok what kind of screws do i need just to fix that section at least till i have money to do the whole room
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Old 07-23-2012, 07:56 PM   #9
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Is that mastic between the CBU and tile?
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Old 07-23-2012, 08:08 PM   #10
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Yesterday
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Old 07-23-2012, 08:08 PM   #11
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Hahaha yes it is
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Old 07-23-2012, 09:58 PM   #12
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There called backer-on screws there meant for cement board find them at HD. but it might not be your remedy for this.

So take all the loose grout up and tiles that come up easy, scrap and clean the tile adhesive off. mix modified thinset to like peanut butter consistency
Use 1/4"x 3/8" U notch trowel and put some thinset lines down neatly, place your tile(s) back down and press down gently wile wiggling the tile slightly.

That and some hope see what happens
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Old 07-24-2012, 12:09 AM   #13
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Quote:
Originally Posted by troylee500 View Post
I have .5 plywood and .25 cement board. The grout is always breaking and the tile gets loose, i all ready try the original cement thats use for tile and readyset premixed mastic adhesive and still get same result. This is only happening in one sectio of the living room. Is there any other type of glue thst i can used i was even thing of replacing the grout for caulking.
What is underneath the 1/2" ply?
If you have had repeated failure, chances are good there is too much bounce in your floor.
If so, until you address that issue, you will keep getting the same results.

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Old 07-24-2012, 07:53 AM   #14
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The person who installed these had absolutely no idea what they were doing.
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Old 07-24-2012, 10:47 PM   #15
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Ill give it a try thanks!!

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