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Unread 10-15-2018, 09:56 PM   #1
hhcibtpaun
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Unmodified for large format porcelain?

Hey Folks,

I have a question that may be a tad off the norm.

I ripped up a tile floor from a concrete floor and have plans to lay down some luxury vinyl tile. However after ripping up the existing tile I noticed that the concrete floor settled (4th floor condo), and dropped in a section by about 1/2". I am planning to install cabinets before laying down the new floor.

Since the one wall of cabinets is 1/2" lower, than the other, I need to "shim" up about 1/2" for a section that is about 2' x 4'. My original thought was to just use some cement board or hardiboard and thinset that to the floor (no screws), since it is just a shim under the cabinets. I still may go that route, but I purchased some large format tiles (12"x24") for $.25 each. My plan is to just thinset these directly to the concrete....

So, my question is do I need any special large format tile thinset, or can I just use a $6.00 bag of TEC unmodified from lowes? I think my research led me to believe that the unmodified can dry without much air, so it may work for the large format tiles.

Again, this is just a shim for under 2 cabinets, so it just needs to fill 1/2" and does not need to be pretty. Will the unmodified be fine, or do I need to have something special? Would my thought on hardibacker without screws work?

Looking for a quick solution...Have the counter guys coming in a day or two and I need to get the cabinets in so they can template. I started out using cedar shims, but want to have support under the entire cabinet...the floor has imperfections, so the thinset will help smooth those out, then i figure I can just press and level the tiles or hardiboard...

Any help would be appreciated.

Thanks....Mike
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Unread 10-15-2018, 10:03 PM   #2
jadnashua
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Is is sort of a bowl like depression? Might be a good candidate for Ardex's Liquid Backerboard. The tile and thinset might work, but maybe harder to actually get it all leveled out.
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Unread 10-15-2018, 10:06 PM   #3
hhcibtpaun
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its just like the floor settled at the expansion joint. If I put 1/2" wood shim down the length of the cabinets I can get it close...i was going to just throw down 1/2 sheet of plywood, but there is some thinset still on the floor, so i figured a 3/8" tile and thinset would give some wiggle room...
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Unread 10-16-2018, 12:04 AM   #4
Tool Guy - Kg
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Yeah, you could use this cheap mortar for this application.

However, if the level of the floor outside this area is wavy, you might wanna think about using a leveling product for the whole floor. Floors sure do look and feel nice when they're really flat.

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Unread 10-16-2018, 06:04 AM   #5
hhcibtpaun
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thanks, yes for the floor outside this area, i think self leveler is in my future....

thanks...Mike
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