How to Fix Squeaky Floors

Walk slowly across the squeaky area, shifting your weight from foot to foot. Mark the squeaky spots with painter's tape. If you have access from below (basement or crawl space), have someone walk upstairs while you watch and listen from below. You'll likely see the subfloor flex slightly at the squeak point. Mark the spot from below with tape or a pencil.

If you can see daylight between the subfloor and the joist from below, tap a thin wood shim coated with construction adhesive into the gap. Don't force the shim in aggressively — you just want to fill the gap, not push the floor up and create a bump. The adhesive keeps the shim in place permanently. Have someone stand on the squeak spot above to verify the noise is gone.

For larger gaps or persistent squeaks, drive a short screw from below up through the subfloor to pull it tight against the joist. Drill a pilot hole first. Use a screw that's long enough to bite into the subfloor (3/4 inch thick) but NOT long enough to poke through the finished floor above. For 3/4-inch subfloor over hardwood, use a 1-inch screw. Have someone stand on the spot above while you drive the screw.

If you can't access below, use a Squeeeeek No More kit (or Counter Snap for hardwood). For carpet: place the kit's alignment tool over the joist location, drive the scored breakaway screw through the carpet and subfloor into the joist, then snap off the screw head below the carpet surface by rocking the tool back and forth. The screw pulls the subfloor tight and the broken-off head is hidden under the carpet.

For hardwood floors, drill a 1/16-inch pilot hole through the floor into the joist below. Drive a trim-head screw (very small head) into the pilot hole to pull the floor tight against the subfloor. Countersink the screw head slightly below the surface with a nail set. Fill the tiny hole with color-matched wood filler and wipe smooth. The repair is virtually invisible once the filler dries.

Walk across the repaired area multiple times with normal foot pressure. If any squeaks remain, they're likely at a different joist or between joists. Repeat the shimming or screwing process for each remaining squeak point. Check again in a few days — temperature and humidity changes can reveal squeaks that weren't active during your initial repair.