How to Fix Squeaky Floors

Why floors squeak

A squeak is almost always friction — two building components (subfloor and joist, subfloor and a loose nail, or two subfloor panels) rubbing against each other slightly as weight shifts the floor. Over time, wood subflooring can dry out and shrink slightly, nails can work loose from the joists below, or a subfloor panel simply wasn't perfectly secured to begin with. It's rarely a sign of a serious structural problem, but it is a genuinely fixable annoyance most of the time.

Fixing it, depending on your access

• If you have access from below (basement/crawlspace): have someone walk across the floor above while you watch for movement at the joists. Where you see the subfloor flexing away from a joist, drive a subfloor screw up through the subfloor into the flooring above (short enough not to poke through the finished floor) to pull the layers tight together.
• If there's a gap between the subfloor and a joist: a thin shim, lightly coated with wood glue, tapped into the gap (not forced hard enough to lift the floor) can eliminate the movement causing the squeak.
• If you can only work from above (finished floor, no basement access): specialized squeak-repair kits use a fastener system designed to snap off cleanly below the surface after securing the subfloor, minimizing visible repair marks — these work through carpet, and some systems work through hardwood with more care.
• For hardwood specifically, sometimes a small amount of powdered graphite or talc worked into the seam between boards can temporarily quiet a squeak caused by boards rubbing against each other, though this is a band-aid rather than a permanent fix.

Pro tip from our network contractors

Before assuming a squeak needs a full repair kit, try the simplest fix first: locate the exact board or joint (have someone walk slowly while you watch/listen) and drive a single finish nail or screw at an angle through the flooring into the joist at that precise spot. Many single-board squeaks resolve with this alone.

When a squeak means something bigger

Widespread squeaking across many rooms, combined with visible sagging, bounce, or excessive flex when you walk, is worth a professional look rather than a DIY fix — that combination can point to undersized joists, moisture damage weakening the subfloor, or another structural issue beyond normal wear. An isolated squeak in one spot, on an otherwise solid-feeling floor, is almost always a simple fix.