I have a 5×10 mud room floor to tile.
Old vinyl tile has been taken up and old black adhesive from the vinyl tile “isn’t going anywhere” if you know what I mean.
Is it okay to tile over the old adhesive? Will the thinset bond? Any prep I should be aware of?
Mick
Replies
Nobody?
The best plan is to get a floor scraper and scrape as much of the old stuff off as you can. Generally, you'll be left with reasonably clean concrete.
Which will hold thinset just fine.
I won't be laughing at the lies when I'm gone,
And I can't question how or when or why when I'm gone;
I can't live proud enough to die when I'm gone,
So I guess I'll have to do it while I'm here. (Phil Ochs)
you'll be left with reasonably clean concrete.
I pictured wood subfloor. He doesn't specify.copper p0rn
you'll be left with reasonably clean concrete.
I pictured wood subfloor. He doesn't specify.
Think the title is a hint?
Tile over slab/old adhesive
Joe H
AHA.copper p0rn
I figured by stating "Slab" in the title and thinset in the post that it would be obvious that I was talking about concrete. I shouldn't assume, my bad.
Yeah. I should have caught it.copper p0rn
Yes, that's pretty much what I did.
I just wasn't sure if the adhesive that won't come up would be ok if "thinsetted" over.
what kind of tile?
What subfloor?
Probably OK, but I can't see it fro here.
Using dry ice can make that stuff brittle enuf to chip right off easy
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They make soy based removers that work REALLY REALLY well. Pour it on, wipe it off with a paper towel. Very clean results, and no questions about bond.
Tu stultus es
Rebuilding my home in Cypress, CA
Also a CRX fanatic!
Look, just send me to my drawer. This whole talking-to-you thing is like double punishment.
Where would I find that? Do you have a name of the product by any chance?
http://www.abatix.com/products/CHEMICALS%20@@26%20PAINT/ASBESTOS@@2e1/MASTIC%20REMOVER.aspx
Just a warning, that black stuff may have asbestos in it. This is still the right stuff to remove it safely so it doesn't kick up any dust.Tu stultus es
Rebuilding my home in Cypress, CA
Also a CRX fanatic!Look, just send me to my drawer. This whole talking-to-you thing is like double punishment.
Edited 12/4/2009 12:06 am by xxPaulCPxx
Edited 12/4/2009 12:07 am by xxPaulCPxx
I had a similar situation. I found that Citrusolve citrus cleaner dissolved the old black goop very well. Use lots of paper towels and you can get the concrete pretty clean.
Thanks for info.
Just for my own FYI, if I were tile over the remaining adhesive, would it be acceptable? Or is this a definite NO NO ?
I've never used the solvents described but if they work I would recommend getting that old glue up. I have visions of dragging a notched trowel over it and having it get hung up on bumps, leaving gaps in the thinset, and generally making a mess of things. Depending on how thick it is, will it create "voids" where the thinset would be? Is it high enough to be taller than the thinset?
Edited 12/3/2009 10:53 pm ET by geoffhazel
The newer adhesives come up pretty easily with a hair dryer and a putty knife. When you say "black adhesive" I'm imagining the 80 year old house we renovated and I think your right, it probably isn't coming up very easily.
Interesting ,thanks