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Help! How to fasten down subfloor to stop squeeking?

Help! How to fasten down subfloor to stop squeeking?

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  #1  
Old 05-08-10, 12:34 PM
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Help! How to fasten down subfloor to stop squeeking?

My plywood subfloor is squeeking in spots and I need to fix it before my new oak flooring is installed. I took up the carpet so I have access to the 3/4" subfloor from the the top. Would it be better to try and screw down the flooring again through the joists or use spiral flooring nails. And what type of screw would be best suited to this task?
 
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  #2  
Old 05-08-10, 05:35 PM
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A screw with at least 3/4 inch of threadless shank at the top would clamp the two materials together. That along with the use of an appropriatly sized countersink bit as step one to sink the head without having to overdrive it.

Pick your battles with the screws. Try and locate existing fasteners... Or X them with a marker. Don't wanna drive the installers nuts!

Let's see what else people think here.
 
  #3  
Old 05-08-10, 09:23 PM
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Screw it! I use a 2 1/2" flat head square drive. Every 8" or so into the joist.
 
  #4  
Old 05-08-10, 10:18 PM
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Heavy duty deckings screws

Heavy duty deckings screws are the solution. Square drive or hex drive - either works well. Don't use dry wall screws - they are too weak.
 
  #5  
Old 05-09-10, 06:33 AM
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I agree with all. I am a torx man, myself. Less slippage and good drivability. If you miss a joist with the screw, don't leave it, pull it out.
 
  #6  
Old 05-10-10, 05:44 PM
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I'm going to try and shim the underfloor as well. What do you use for shims just regular cedar shingles?
 
  #7  
Old 05-11-10, 03:34 AM
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You can use the shingles, or buy shims in packs at one of the big box stores.
 
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