Locate the exact squeak by walking on the floor and marking the spot
Tighten loose subfloor or floorboards from below if accessible
Drive screws through the subfloor into the joist to secure loose areas
Use a stud finder to locate joists before fastening from above
Apply construction adhesive between joists and subfloor if the floor is open
Sprinkle powdered graphite or talcum powder into small gaps between boards
Insert shims into gaps between joists and subfloor where movement exists
Add blocking or bridging between joists to reduce flex
Replace damaged or warped boards that no longer sit flat
Refasten loose hardwood flooring with finish nails or trim screws
Use squeak-repair kits designed to snap off below the surface
Check for loose fasteners, nails, or staples and secure them
Reduce floor movement by reinforcing joists if they are undersized or damaged
Repair any water damage or rot before fixing the squeak
Cover the area with carpet padding or underlayment if replacing flooring
Hire a professional if the squeak is widespread or the structure is compromised