swiftvet
member
Reged: 09/09/05
Posts: 137
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I'm installing floor tile at a restuarant for the 3rd time in the same spot. Cleaned floor, air hammered all the old adhesive up. Slightly wet the floor (concrette),used a 2 hour thin set with a 1/2 notch trowel and laid tile. Grouted after 3 hours.
After about 1 year the tile began to pop up. Any suggestions. Thanks to all
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Just_Bill
10,000 Stars
Reged: 01/27/02
Posts: 17239
Loc: Wilmington, Delaware
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Moisture under that spot, thinset not cured before grouting??
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bljack
Tile Setter By Trade
Reged: 07/12/04
Posts: 1655
Loc: Central Jersey
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Kitchen area or dining/common area? Check the perimeter of the rooms. Is is grouted? All tile work needs perimeter expansion gaps and interior tile work needs expansion gaps within the field every 20-24' as well. If the perimeter is grouted and/or the span is long enough, as soon as the grout has cured, the forces of the walls start working against the shear bond strength of the still curing thinset of the patched tile area.
I'm betting each time you've gone there, you've treated the symptom (tenting) but did not cure the disease (lack of perimeter/field movement joints)
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MCA
Carpal Tunnel
Reged: 03/09/06
Posts: 2554
Loc: Illinois
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I also had a problem with tile in a restaurant. There was no expansion gap in the whole area, then one day a row of tiles that have been installed for 30 years just broke in half down the middle of the whole row and formed a mound at the split. The whole floor sounds hollow, the expansion sheer forces must have severed the bond across the whole floor. It is thick quary tile, so the tile is still in good condition, but not bonded to the floor. Expansion forces are powerful.
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PatyMkc
newbie
Reged: 02/09/10
Posts: 8
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Sounds like a moisture source under the floor or, a bad concrete mixture on the original floor.
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swiftvet
member
Reged: 09/09/05
Posts: 137
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Thanks to all. I was considering that grease may have penatrated the concrtette and thought of using a acid to etch or clean the area before tiling. Also can someone tell me if I should use mortified or non-mortified thin set. I use a two hour quick set for times sake. Thanks again. The floor has expansion joints and a large joint that runs the entire floor. Also the area was only 3x3 the first time round and now is 5x10.
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bljack
Tile Setter By Trade
Reged: 07/12/04
Posts: 1655
Loc: Central Jersey
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Rapid setting mortars are modifieds. The size of the area growing each time makes it sound even more like an expansion issue. Tap on the tiles around the repaired area, you will probably find them hollow sounding. Check the perimeter. I'll bet there is no movement accommodation. Also, are these expansion joints in the slab carried through the tile field as soft joints? They must be honored in the tile assembly. It only takes 1/16" in horizontal movement to create a shear bond failure. I am more certain now that when I first responded.
I'll post the complete details for movement joints tomorrow, that is, later today.
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bonswa
first timer
Reged: 03/14/10
Posts: 1
Loc: MO
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Anyone have experience with premixed grout on ceramic flooring? I mixed all of my mortar but it sure would be nice to use the premix grout, which I found at Lowe's. The salesperson seemed knowledgeable and the price the was the same as the no mix by the time you added the sealer, etc so on the surface it appears they had no vester interest either way....as long as they sold me something.
Tim
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ront02769
Carpal Tunnel
Reged: 03/03/04
Posts: 8337
Loc: New England
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you could just lay the tile without any cement at all. probably last about the same length of time as using the pre-mixed stuff.
ront
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brooksnb
Super Handyman
Reged: 03/03/07
Posts: 2138
Loc: New Brunswick , Canada
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I have used the premix grout ...it did fine ..been three years and the grout is still holding between the tiles well and stain free..It's in a kitchen with quite steady family traffic.
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Dennis
Just another trouble making Canadian....
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