lifting subfloor


Old 03-11-04, 11:40 AM
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Unhappy lifting subfloor

About six months ago I laid a new vinyl floor in my kitchen. In doing so I also put down a new subfloor (plywood). I thought I screwed it down very securly with lots of screws but unfortunately one of the but seams between a couple of the plywood sheets is loose and moving up and down about 1/16" when you walk over it.

The vinyl flooring will evenually fatigue and crack so I need to do something to fix it. The loose seam is about 18" long.

Any ideas on how to fix this?

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Old 03-12-04, 09:09 AM
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Do you have access from below the floor? (basement)

If so then you could attach a piece of wood between your joists in the area in question and then use screws to pull the floor back down to the joists. Just make sure your screws are not too long or you'll end up poking through the flooring above.
Old 03-12-04, 10:12 AM
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Sounds good to me, I'll give it a go.
Old 03-12-04, 01:49 PM
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I would also suggest using some glue.
Old 03-12-04, 01:53 PM
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Glue what, the screws?
Old 03-12-04, 03:54 PM
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Carefully drill holes from below, being careful not to penetrate the subfloor. Inject glue, and then apply screws.

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