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Old 04-15-2013, 03:25 PM   #1
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Tile not sticking


Hello everyone I have a question or two about a year ago I had my kitchen floor tiled. The sub floor was completely replaced with two layers of ¾ plywood. The room was free of any obstructions it was totally gutted. I had 13x13 inch porcelain tiles layer using multipurpose pro thin set mortar by laticrete. The tiles were layed directly on the plywood subfloor, the problem is the tiles all sound hollow under neeth them. I lifted several tiles and the thin set lifts off the tile and plywood rather easily. You can see all the trawl marks as if the tile was barely pressed down. My question is what did this guy do wrong and how can I fix it. I think he used a ½ trawl and ¼ inch spacers. The problem I have is now I have the peninsula and all the base cabinets that I can’t remove to fix the tiles that are set an inch or so under them. Any advice will be appreciated because I will be tileing my bathroom next and it will be just as the kitchen was totally empty and new sub floor.

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Old 04-15-2013, 05:39 PM   #2
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Tile not sticking


Applying directly to the plywood for one thing was a bad idea.
Did he back butter the tiles before installing?

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Old 04-15-2013, 09:04 PM   #3
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Tile not sticking


Ken,

Sorry to hear of your problem. My best guess from afar is you're looking at a total rip-out and redo. I'll also guess you didn't hire a tile setter, but a handyman at best, cuz a tile setter would not have installed the floor that way.

If by chance you only have a few tiles affected, it may be possible to repair them and get a little more time. I'd have to know more though.

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Old 04-16-2013, 01:27 AM   #4
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Tile not sticking


Installing tile directly onto plywood is not necessarily a disaster - some installs work fine. But obviously it wasn't a good install. The installer could have
- used too small a trowel size
- let the thinset dry out too much before getting all the tile down
- mixed the thinset too dry.
- not pressed the tile very well into the thinset
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Old 04-16-2013, 03:12 PM   #5
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Tile not sticking


If I may ask, the proper way to do this would be to put cement board down on the plywood, and tile on that?
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Old 04-16-2013, 03:17 PM   #6
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Thinset, CBU, thinset, tile.
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Old 04-16-2013, 03:21 PM   #7
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I know it's not ideal, but the tile in one of our bathrooms is still original, from 38 years ago, and is adhered directly to plywood. There is only one tile cracked in it, and I wouldn't be suprised if it's because something heavy was dropped on it........
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Old 04-16-2013, 06:59 PM   #8
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Tile not sticking


Quote:
Originally Posted by Amateuralex View Post
If I may ask, the proper way to do this would be to put cement board down on the plywood, and tile on that?
I prefer Ditra over cement board (meaning Ditra instead of cement board.)

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