OSB for Subfloor?

Discussion in 'Remodel Forum & Blog' started by molo, Apr 8, 2009.

  1. molo

    molo Member

    Messages:
    845
    Location:
    cold new york
    What problems (if any) can be caused by using OSB for subfloor.
    I'm asking because I don't need structural support, just a smoother surface to lay the luan on. You see... It's an old house with 1" thick boards for a subfloor (varying widths and slight thickness differences). :)

    Thanks for any replies
  2. frenchie

    frenchie Jack of all trades

    The edges swells up, if it gets damp or wet. Doesn't hold nails quite as well as ply, either.

    Just use 1/2" ply, instead of the luan.
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,152
    Location:
    New England
    For a subfloor, I like Advantec, but for what you're looking for, ply is better, I think as well.
  4. molo

    molo Member

    Messages:
    845
    Location:
    cold new york
    I'll ditch the OSB idea. Can I lay linoleum directly over 1/2" ply and not have problems? What treatment do the seams receive?

    Thanks,
    Molo
  5. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,360
    Location:
    Yakima WA
    The problem with regular plywood is there may be voids here and below the top ply. A sharp weight such as an appliance or woman's high heel can break through. What you should use as an underlayment is called multiply. It comes in 1/4"x4'x4' sheets and may have different names. It's like plywood, but it has no voids. As I recall, it isn't much different in price from plywood.
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