Locate the exact squeaky spot by walking on the floor and marking it
Tighten loose subfloor or joist connections from below if accessible
Drive screws through the subfloor into the joists to secure loose boards
Use trim screws or finish screws on hardwood floors, then fill the holes
Apply construction adhesive between subfloor and joists where accessible
Sprinkle powdered graphite or talcum powder into gaps between floorboards
Insert shims into gaps between joists and subfloor to reduce movement
Add blocking or bridging between joists to stiffen the floor
Replace damaged or warped boards that no longer sit flat
Refasten loose nails with screws for a more secure hold
Use a squeak-repair kit designed for floors above finished ceilings
Check for moisture issues and fix leaks or humidity problems
Secure loose underlayment before reinstalling flooring
Refinish or replace flooring if wear or damage is severe