How to Fix a Squeaky Floor Caused by Gaps Between the Subfloor and Joist

Squeaky floors can be extremely irritating. Fixing a squeaky floor caused by gaps between the subfloor and joist is easiest if you have a basement or an access space. Floors get squeaky when wood dries out (either finished wood or a wooden subfloor), causing the subfloor nails to pop loose and the subfloor to separate from the floor joist.

1

Gather your materials: Chalk, shims, hammer, screws or nails.

You also need a helper who weighs enough to make the floor squeak. A pipsqueak of a kid may not weigh enough to create a squeak.

2

Have your helper walk across the floor looking for squeaks.

Go to the basement under the room where the floor squeaks. Have your helper walk across the floor and stop when they hear the squeaking.

3

Mark the spot with chalk.

Your helper may have to bounce up and down a couple times until you identify the exact location from below.

4

Hammer in a shim between the joist and subfloor where you see gaps.

Look for gaps between the subfloor and the floor joist; drive a shim between the joist and subfloor with a hammer. You might need to put a couple of shims together to fill the space tightly.

Comments (4)

  1. Posted by Paul
    What do you need screws for if you're just hammering in a shim?
  2. Posted by ICD
    Your tips are really very useful, but i wanted to know more thing that, Can i use simple nails on my Mezzanine Floors ?
  3. Posted by ICD
    Oh thanks i didn't think about it, absolutely there will be no need of screws, Thank you Paul:)
  4. Posted by Jay W
    I have a similar problem. One wall between 2 bedrooms is seperated from the floor by 1 inch. It causes the floor to squeak. When the construction crew came over, they inserted some wood blocks in the space so the squeak would stop. But it causes the sound to pass through from the first floor to the second floor easily. What is the proper fix for the problem? I have a slideshow demonstrate the problem: http://www.youtube.com/watch?v=GsZJyW9HmDg Can someone help me? Thank you. Jay

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