1/4" underlayment over concrete?

Discussion in 'Remodel Forum & Blog' started by little buddy, Jan 22, 2009.

  1. little buddy

    little buddy New Member

    Messages:
    37
    I have an entrance way that currently has 12" stick tile on a concrete slab. I was wandering if I could put underlayment down over the tile. It's about 6'w x 12'l. I know I could tear up the tile and spread some leveling compound but would rather put down underayment if it would work.
  2. GabeS

    GabeS Remodel Contractor

    Messages:
    294
    Location:
    Brooklyn NY
    What kind of finished flooring are you looking to install afterward?
  3. statjunk

    statjunk DIY Senior Member

    Messages:
    542
    Given that you have a slab I'd remove it. You wouldn't need leveling compound because after you get the sticky tiles up you can use a scarifier to remove the adhesive. Works very fast. The amount of space your talking about would be done in about 10 minutes. Maybe you'd have to hit the corners and some edges with a straight razor but the whole job not including returning the machine should take under 1.5 hours.

    This is without seeing exactly what you're dealing with.

    Tom
  4. little buddy

    little buddy New Member

    Messages:
    37
    1/4" underlayment

    Thanks for the response,

    I was thinking of going back with lanolium, ( excuse the spelling on that one) but may go with lam. flooring. It's the entrance area in my rental. I can see some divits or damage to the slab, that's why I was wondering about 1/4" underlayment. Thanks again
  5. statjunk

    statjunk DIY Senior Member

    Messages:
    542
    The divits can be repaired with bonding agent and thinset or concrete depending on the depth.

    Tom
  6. GabeS

    GabeS Remodel Contractor

    Messages:
    294
    Location:
    Brooklyn NY
    I'm not quite sure how you would bond the underlayment to the concrete. If the vinyl tiles are bonded good and flat you could probably go right over it with laminate floating floor. It would serve as a vapor barrier.

    Not sure if the linoleum glue would bond to the vinyl tiles. Haven't worked with linoleum before. If it does bond to the vinyl, the bond will only be as good as the vinyl bond to the concrete.

    If it were my house. I would go over the old flooring with these finish materials. Don't see the benefit of going through the headache of tearing everything up and dealing with the adhesive leftover.

    If you were doing ceramic tile, then you would definitely have to tear up the vinyl.
  7. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,023
    Location:
    New England
    Assuming the current covering is not sheet goods, covering it with linoleum without doing something first will likely allow the seams to telegraph through, then keep in mind the new floor will only be as well attached as the current one. Remove it, flatten the floor, and put in new. Keep in mind laminates require a VERY flat floor, or they will likely fail. Doesn't have to be level, but it does need to be flat.
  8. statjunk

    statjunk DIY Senior Member

    Messages:
    542
    Could not have said it better!

    Tom
  9. little buddy

    little buddy New Member

    Messages:
    37
    flooring

    Thanks guys, I think I'll go back with the laminate. I've done quite a bit of that and feel pretty comfortable with it. Thanks again
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