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Unread 04-26-2006, 11:20 AM   #1
ClemsonS197
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Join Date: Apr 2006
Location: Woodstock & Atlanta, GA
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Newbie, Slab prep for ceramic tile.....

Sorry for the newbie question, but i've searched alot and have conflicting answers.

I'm about to rip up my linoleum kitchen floor, that is glued down to the slab. My house is slab on grade. There is no padding of any sort. I plan on installing 12x12 tiles w/ 1/8" spacing. I read I need to get the glue off the slab. What's the best method? Just scraping, or using a solvent? Also, I read that if my slab absorbs water, I can lay down a thinset and go. But if it has a sealer, then do I use another cleaner/solvent or do I scuff it up with a wheel (what kind?) on a grinder? I have an angle grinder I can buy a wheel for if I need to do that.

Also, my slab has no real thick cracks, just some spider lines with no vertical displacement between the pieces. It does have very minor waves in it. Would you recommend a thinset or medium bed? Also, I've noticed a ton of members dropping name brands and types for various installs. Any advice on this application? Thanks for the help.

-Kevin <= My first name. See I did search, I saw you call out everyone w/o a name.
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Unread 04-26-2006, 12:09 PM   #2
bbcamp
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Kevin, welcome to the forum! And thanks for the first name!

Like you probably read, how much work you have to do depends on teh glue they used. So the first thing is to pull up a corner and tell us what you find.

Mechanical removal is preferred over solvents. Solvents can jsat drive the glue into the concrete and form a bond-breaking layer. Scrape what you can with a 4" razor scraper, then do the water absorption test.

Once you get you slab cleaned up, measure the flatness by using a 8 foot long straight edge and measuring the gap between it and the floor. Do it ins several locations and orientations to get a clear picture of your floor topography. Let us know what you find.

The products you will need depend on these 2 homework assignments.
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Unread 04-26-2006, 07:10 PM   #3
sandbagger
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you might drop by the rental crib at homer's - I was there awhile back to check on a bead blaster when the guy pointed to a "scarifier" (I think that's what he called it). The guy said it's great for prepping floors for tile. Leaves a roughed-up surface and takes off glue, paint, pretty much anything that's on the surface. Rental included a big vacuum to suck it all up. Best part is it's LOTS cheaper than the bead blaster. I'll be renting one shortly but still have some work that could add more mess to the floor.
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Unread 04-27-2006, 06:00 AM   #4
ClemsonS197
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Bob -

I called my supplier last night and only 1/2 my tile has arrived, and the rest wont be in for another week or two, so my homework will have to wait I guess. I'd get another supplier, but the price is too good not to wait. Thanks for the help guys, hopefully I can start soon.

-Kevin
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Unread 04-27-2006, 06:02 AM   #5
bbcamp
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You could start your floor prep before the tiles arrive.
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