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Old 01-21-2014, 05:58 PM   #1
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More ceramic/Lino/concrete question

Couple of new questions about upcoming DIY ceramic tile job. The
It appears the Lino tiles mentioned in previous post are going to need to come up after I pulled the rest of the carpet up. In my previous post I was told I would need to remove the mastic that was used from the concrete slab for the ceramic to adhere. Can anyone recommend a solvent/process? It looks like the mastic has stained the concrete. Will I need to get the stain out as well? Beginning to look like too much time and work if so. Could a new substrate (cement board or plywood) be attached to the slab using construction adhesive and then tiled? The slab is 70+ year old and very hard. Maybe the best solution is new carpet Thanks


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Old 01-21-2014, 06:33 PM   #2
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It's not that big of a chore----first of all---no solvents---they will soak into the concrete and become a bond breaker.

After the tiles are removed---use a razor scraper to remove as much as you can---there are long handled ones available in the tile section of most stores--

If that isn't removing enough of the cutback---pour some hot water (boiling if you can) over the mastic--and have another go with the razor scraper--

Let it dry out--then set the tiles with a two part thinset like Kerabond and Keralastic--or a modified thinset approved for use over cutback--

I've also encapsulated cutback using Jifset mixed with Linewebers liquid latex---


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Old 01-21-2014, 09:05 PM   #3
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Originally Posted by Mike
Maybe the best solution is new carpet
No, no, that would be so unsanitary. But yes, it's easier and cheaper in the short term.

You can not use solvents to remove the adhesive. You need a razor scraper and knee pads cuz you're gonna be at it awhile.

No concrete backer or plywood, that would be a bad move.

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Old 01-21-2014, 09:38 PM   #4
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Thanks. Started getting up the Lino tiles tonight before running out of gas. For the most part they come up easily (some popping up whole) using a garden edger. Kind of a hoe but the blade extends straight from the handle. A lot easier than I anticipated . I have found some cracks in the slab and I'm going to be patching in places so is an isolation membrane a good idea? If I find the floor isn't flat I'll try some leveling compound once the glue is up unless there is a reason I shouldn't. Appreciate all the great advice, Mike.

Last edited by Mike in Arkansas; 01-21-2014 at 10:32 PM.
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