Locate the exact squeaky spot by walking on the floor and marking it
Sprinkle talcum powder or graphite between loose floorboards
Tighten loose subfloor or joist connections from below if accessible
Drive finish nails or trim screws into squeaky boards at an angle
Use floor repair screws designed to pull boards tight without visible heads
Add wood shims between joists and subfloor where gaps exist
Apply construction adhesive to loose areas during repair
Refasten loose hardwood boards with cleats or staples if appropriate
Replace damaged or warped boards that cannot be secured
Secure the subfloor to joists from underneath to stop movement
Lubricate rubbing boards with powdered graphite or soap
Reinstall or tighten baseboards and trim if they are causing the noise
Reduce seasonal movement by maintaining stable indoor humidity
Hire a flooring professional for widespread or hard-to-access squeaks