Subfloor still squeaking

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Old 07-10-12, 02:18 PM
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Subfloor still squeaking

Hello,

my subfloor (Plywood) is still squeaking even after putting screws in.
I don't know if the distance of 2 ft for every screw is enough.
What distance should I put screws in?

Thank you
 
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Old 07-10-12, 02:37 PM
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Are you hitting the joists with your screws? Go under and see if you can see screw tips. If so, you aren't stopping anything. Is this the only layer of subflooring? A second layer of subflooring should NOT be screwed into the joists, only the first layer.
 
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Old 07-10-12, 02:41 PM
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Yes, screws are hitting, otherwise the crews would not be tighten. I ripped the carpet out, because I would like to lay a hardwood in, but would also like to stop this squeaking. How many screws should I put in and what distance? I may do not have enough in.
 
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Old 07-12-12, 08:23 AM
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I screwed around 50-60 screws in evry room and this did it. There were to few in there bfore which could not stop the squeaking. Why don't do the builders this in the first place?
 
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Old 07-12-12, 02:07 PM
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I should think every foot on every joist would suffice. You have to put them in every joist or the one next to it will squeak. Not sure what your builder did, but we glue subflooring down with PL Advanced, then install fasteners, whether they be screws or ring shank nails.
 
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Old 07-12-12, 02:17 PM
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That should be the way to do, but I think it is cheaper and faster just nailing it.
"Let the homeowner do some reinforcement later"
 
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Old 07-12-12, 02:27 PM
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My former in-laws built a lake home about 10 years ago and I sunk a screw in about every foot like Chandler mentioned. I still go up there once in a while (since they like me better than their daughter ) and there is no squeak in any floor of that house.
 
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Old 07-12-12, 02:42 PM
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What a little screw can make a difference.
 
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Old 07-12-12, 02:43 PM
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Well, in my case it was more than 3,000 of them....
 
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Old 07-12-12, 02:51 PM
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I may go up to 1000 when I have done my floors.
 
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Old 07-12-12, 03:54 PM
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I know I'm too late, and I apologize for not mentioning it earlier, but I hope you aren't using drywall screws . They will shear off and are affected by moisture. I would use T25 Torx 2" x #8 decking screws. Much easier to put in, don't cam out on the head, and are not affected by moisture, etc.
 
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Old 07-13-12, 06:08 AM
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I am using decking screws of course, but thank you for pointing this out.
 
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Old 07-15-12, 06:29 PM
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I have now over 150 screws in a room of 15x13 in the plywood and it is still cracking. I dont know what else to do.
 
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Old 07-15-12, 07:56 PM
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I have now over 150 screws in a room of 15x13 in the plywood and it is still cracking. I dont know what else to do.
Can you get to the joisting below this floor? If so, here are some suggestions:
  • Check every joist, carefully, for cracks - sister any section where you see those, and use the sistering piece as a lever to increase upward force;
  • Check the cross-blocking - install or repair/replace as needed;
  • If the squeaking is more noticeable in humid weather, you may need to relieve some of the joints with a single cut with a narrow blade on a rotary saw - the subfloor could have been installed with wood that was insufficiently cured, and/or installed tight in dry weather;
  • If the squeaking is confined to a small area, you may be able to release the screws in that area and shim the subfloor with some cedar shingles, then re-tighten the screws.
 
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Old 07-15-12, 08:16 PM
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Just a crazy thought, a couple of years ago I put down a double platform floor in a basement and there was a squeak that I couldn't account for. As Chandler mentioned it was screwed and PL was applied. It took me hours and the partial destruction of one of the platforms but finally found it.

It turned out that that a joist hanger had only been TECOed in one direction and the joist would move just enough when walking on for the squeak to occur.
 
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Old 07-16-12, 07:38 AM
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oh man, that sound like a very looong day in my crawl space.

THank you guys.
 
 

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