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Old 02-07-2008, 08:58 PM   #1
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Squeaky Subfloor in Upstairs Bedroom

Hi all!

I am trying to help someone to eliminate a squeaky subfloor before new carpet is installed. I've removed the old carpet and pad. One section of subflooring is stubbornly squeaking/creaking. I've tried screwing down the whole room floor surface into the joists with 3" exterior screws. On one end of this stubborn section, it appears that the edge does not lay over a joist, based on the screws not appearing to grab (spin when inserted all the way down). I suspect that this may be the problem. How can I work around this? What other ways are their to join what probably are at least two layers of subflooring together? The floor beneath is not exposed but is the sheetrock ceiling in the living room below this bedroom. I do not know how many layers of what thickness the subfloor is composed of. A plywood looking layer is on top. Suggestions, please.



Last edited by Big Dawg Daddy; 02-08-2008 at 05:19 AM.
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Old 02-08-2008, 01:16 PM   #2
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How old is the home?


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Old 02-09-2008, 05:39 PM   #3
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about 20 years old. can you offer a suggestion?
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Old 02-09-2008, 10:43 PM   #4
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If the sub material is tongue and groove and you have seams with no direct support underneath you are probably sunk if you can't get to the bottom side.

You might try to force some construction adhesive deep into the seems and hope for an improvement.
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Old 02-10-2008, 06:29 AM   #5
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Option 2, if you're handy enough: Cut out a 2'x 2' square under the offending area. Install a nailer onto the joist location where the plywood seam is.
Nail it securely into the joist and tight to the underside of the floor sheathing. Use more Construction adhesive on the underside between the nailer and sheathing prior to installing it. Go back and nail off the seam from the 2nd floor. Test for squeaks. If all is well, go to step two:
Step Two: Close up the ceiling area using strapping, sheetrock, compound (tape, coat, sand), paint, etc...
- Build Well -
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