OSB for Subfloor?

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

  1. molo

    molo Member

    Joined:
    Sep 23, 2006
    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

    Joined:
    Dec 30, 2006
    Occupation:
    Caretaker
    Location:
    Brooklyn, NY and Fire Island, NY
    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.
     
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  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    For a subfloor, I like Advantec, but for what you're looking for, ply is better, I think as well.
     
  5. molo

    molo Member

    Joined:
    Sep 23, 2006
    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
     
  6. Gary Swart

    Gary Swart In the Trades

    Joined:
    Sep 1, 2004
    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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