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Old 01-16-2008, 04:01 PM   #1
Graywolf72
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Tile won't stick

Am Kitchen and Bath Remodeler, so not newbie to tile. I recently ran into a problem for the first time in 15 yrs. I put tile in a new kitchen and it just won't stick, tried 4 different mastic and thinset but no luck even tried PL400 wood glue. It hardens around the edge but center is still damp a week later no grout put down with. I am using porcelin tile and Mapei adhesive.
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Old 01-16-2008, 04:14 PM   #2
Jason_Butler
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Any chance that floor may have a varnish or a concrete sealer over it? I assume it is a slab...

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Old 01-16-2008, 05:21 PM   #3
jadnashua
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Is the tile not being held by the adhesive (thinset is the preferred material here!), or is it the adhesive to floor? If to the floor, I'll second the thought it may be a sealed floor...may need scarcifying. If it is the tile, is there any powder or contaminent on it? Anything rub off? Have you tried burning in a layer on the back of the tile first?
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Old 01-16-2008, 05:55 PM   #4
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Temperature?
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Old 01-16-2008, 06:22 PM   #5
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over vinyl?
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Old 01-16-2008, 06:40 PM   #6
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More info more info.Wood glue
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Old 01-16-2008, 06:45 PM   #7
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Quote:
put tile in a new kitchen and it just won't stick,
What are we talking about here? Floor. Wall. Counter top. Tile won't stick To what.
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Old 01-16-2008, 06:50 PM   #8
Brad Denny
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Hey Graywolf,
Sorry, but we are very excited about helping you with your problem. Welcome, BTW, and if you'll go to User CP and put a first name in the Edit Signature box we'd much appreciate it!
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Old 01-16-2008, 07:16 PM   #9
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this wouldn't happen to be that Snap Stone stuff ....lol
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Old 01-16-2008, 07:20 PM   #10
Graywolf72
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Tile

Sorry about lack of info, kids were running wild, so time was of essence.
1st Underlayment is plywood
2nd tried thinset to plywood set tile in came back 24hrs later tile popped loose with little to no thinset on tile
3rd tried mastic for tile buttered back of tile set on floor and came back 24hrs later tile popped loose
4th tried Mapei mastic for porcelan tile buttered tile set in floor tapped in real good left for a week came back tile popped loose, little to no mastic stuck to floor, outside of tile mastic was fully cured but towards center of tile mastic was playdough consistency. Plywood seems to of absorded some moisture and was a little damp

This is happening to only a small portion of tile along center of walkway 16 out of about 40 tile. After each incident used new tile. Tiles are 12"x12".

Temperature hasn't got below 65 degrees
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Old 01-16-2008, 07:29 PM   #11
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Ok,
GW, Welcome to the Forum...
First of all, what is the floor made up of and how thick?
Does floor pass the deflecto test above?
Don't use mastic on floors.
Why aren't you setting on CBU rather than ply?
Don't use glue..
and after 24 hours you usually can pop off the floor fairly easily.
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Old 01-16-2008, 07:34 PM   #12
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First off setting tile directly to plywood is not advised. You need to have a membrane like DITRA or a CBU thin-set and screwed to the plywood subfloor.

Second, i'm not sure how thats even possible unless you mixed the thinset completely wrong.

Third, Same as my first statement. Working with a 12x12 and using mastic is a huge no no by any pro's standard. It would take 6 months or so for the mastic to completely cure under the tile.

--- My advice. I would never set a 12 (let alone anything) on a floor using mastic. I dont care what the directions say, its not the right method. Secondly, you need to figure out what your really gonna set tile to, because setting directly to plywood is a huge no no and will cause you massive problems sooner than later. In the other areas you've laid tile, on top of plywood, with mastic, should be removed NOW and you MAY be able to save them.

I'm not sure where you got the advise to set tile onto plywood, on a floor in a Kitchen and a Bathroom, but they were plain insane and i seriously hope they weren't calling them selves a pro.

I really think you should rethink your entire installation, a membrane like DITRA or a CBU should be used to set the tile to.. I can not reiterate this enough that your installation directly to ply is going to fail with or without thinset and with or without mastic.
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Old 01-16-2008, 08:19 PM   #13
Brad Denny
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What kind of thinset? What kind of subfloor, Advantec, or some of that waxed stuff that's been mentioned before?
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