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Old 01-22-2007, 12:04 PM   #1
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New floor movement...

This weekend I started an install of 5/8 inch wood floor. There are a couple of spots where the floor sags up and down when I step on it. The flooring was laid over the cement slab and an underlay material.
What is the best way to fix this problem?
Thanks for the help.

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Old 01-22-2007, 12:59 PM   #2
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New floor movement...

Sounds like the concrete surface has dips in it that are deep enough that even the underlayment cannot fill adequately. The flooring boards are acting as a "bridge" over the gaps and will continue to flex up and down until the voids in the concrete are leveled out. Good luck.

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Old 01-22-2007, 02:03 PM   #3
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New floor movement...

In other words you are out of luck w/o removing the floor from that area and leveling out the concrete. This is precisely why I hate 'floating' floors. I am considering a glue down approach over my concrete in case I missed some small dips. Hopefully the glue approach will minimize the effects of the bridging if I encounter any.
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