Pine Floor Install

Discussion in 'Remodel Forum & Blog' started by dwilson37650, Oct 13, 2009.

  1. dwilson37650

    dwilson37650 New Member

    Messages:
    5
    Location:
    TN
    Installing a pine floor in a new addition. Boards will probably be 5-6 in wide. I am wondering how necessary it is to run the boards perpendicular to the floor joist. I would like to run them parallel. The sub floor is 3/4" T&G particle board with 4" of sprayed foam below. There is no basment below. If I don't nail the boards into the floor joist will it be a problem down the road?
  2. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    Particle board is hardly a suitable substrate to nail flooring to. And I would fear that you could end up some wavy issues, running parallel.

    Any chance of adding some 3/4 plywood on top?

    Pine will be beautiful. Be absolutely careful to aclimatize the wood inside the building for a week before install. Be VERY careful to allow expansion gaps around the perimiter on all four walls.
  3. dwilson37650

    dwilson37650 New Member

    Messages:
    5
    Location:
    TN
    I really can't add 3/4 plywood due to the height problem it would cause. Any other ideas? I may just have to run it perpendicular and live with it. Thanks.
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,026
    Location:
    Cave Creek, Arizona
    floor

    The ONLY way to nail it properly will be perpendicular to the joists. Otherwise you run the risk of squeaks and warping.
  5. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,384
    Location:
    Yakima WA
    I don't think there would be a risk of squeaks and warping if you didn't run the boards perpendicular to the joists, it would be a certainty. :eek:
  6. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,262
    Location:
    New England
    I would hope the subfloor is OSB, and not particle board. Particle board looks fairly homogenous, OSB has big, discernable flakes and longer slivers of wood. Particle board will blow up like a sponge if it gets wet, OSB, assuming it has an exterior glue, should be fairly stable. Some hold nails as well as or better than plywood, but particle board can shatter.
  7. dwilson37650

    dwilson37650 New Member

    Messages:
    5
    Location:
    TN
    It's OSB board. Will that hold the nails well enough to go parallel?
  8. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,262
    Location:
    New England
    You'd still be safer running it across the joists.
  9. Lakee911

    Lakee911 I&C Engineer (mostly WWTP)

    Messages:
    1,328
    Location:
    Columbus, OH
    Just to vent, my house was built with BOTH the 1x6 pine/fur subfloor and the 3/8" x 1.5" (IIRC) T&G oak flooring running in the SAME direction, perpendicular to the floor joists. Typically the subfloor is run at an angle. The movement of the subfloor has ripped almost every 4th or 5th tongue off the finished floor. It's a mess. It's a rip up and replace at this point.

    I'd run it perpendicular.

    See link for same question: http://www.thisoldhouse.com/toh/asktoh/question/0,,462454,00.html
  10. dwilson37650

    dwilson37650 New Member

    Messages:
    5
    Location:
    TN
    Okay that settles it I'm running the boards perpendicular. I would hate to have to redo it in a few years when the boards start warping, squeaking, and ripping out. Thanks to all for the valued advice! (private note to lakee911... Go Buckeyes!!)
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