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Buckled Wood Floor Solutions

buckled-wood-floor.jpg

From the Brownstoner forums we came across this unsightly photo of wood floor panels that have buckled up.

Hiding under our couch for has been a speed bump in the form of buckled floor boards. The warp spans about 10 slats across and about 8 feet long and at the high point is off the ground about 6 inches. There is no sign of water anywhere near the buckled boards, although the buckling extends under our HVAC unit.

Although the renters are certain there is no water damage most responses to this forum post agree that water has somehow comprised the wood and caused the wood panels to rise. Here's the best answer.

It looks like the wood floor is glued to the concrete substrate. There is no wood sub-floor. This is a very common shortcut used in apartment conversions. A proper installation would have had a plywood sub-floor installed first. Ideally there would be 2 layers which would be screwed to the concrete. The wood floor would then be nailed to the plywood. The glue under your wood floor has separated from the concrete. The problem is that the concrete is dimensionally stable and the wood, especially if its pine is not. Any moisture, which can include ambient humidity can cause the wood to swell and buckle. If this is recent as you say, it will probably go down as the air drys out with the heat coming on. But watch out in the summer, it will likely come back. The only real fix is to tear out the floor and install a sub-floor. As a stop gap, you can get someone to cut the floor boards thinner and reglue them to the floor, but don't be surprised if you see this happen again.

More answers.

Charles & Hudson | January 2, 2009 | Comments () |

 

 

  • Ouch.
    The floor was improperly glued to the concrete substrate. You *can* lay wood flooring directly over concrete, but it must be a "floating floor":
    - lay moisture barrier, with seams taped together, on top of concrete
    - lay foam cushioning made for floating floors to prevent squeaks
    - install wood floor (click together type or traditional tongue-groove)
    - leave 1/4" expansion space around the entire perimeter

    The mass of the floor holds it in place, but allows the wood to expand/contract freely.

    Another method is to install "sleepers" onto the concrete, then plywood subfloor, then add wood flooring. But that raises the floor height...

    I would remove the buckled ones and replace without gluing down. If it continues to happen, pull up all the existing flooring and just re-lay it as a floating floor.
  • We once lived in an old house built in the 1920's that the floor did this. No concrete or plywood. Crawl space had become wet somw how. We told the owner who did nothing and we later moved.

    The sub floor was the cross boards with about a 1/4 gap between.
  • kelly
    As this is tongue and groove, wouldn't' it be possible to float the floor on a layer of foam the way Pergo type floors are? Or would these pieces come loose?

    You'd just have to make sure you leave a 1/2 gap around the edges under the baseboard for expansion.

    You could still glue the tongue and grooves together...
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