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Apply the adhesive and stop the squeak
Squeaky floors are one of those irritants that homeowners endure for a long time before undertaking the repair. There’s a whole hardware doodad industry devoted to solving this problem. Each set of floor conditions favors a particular remedy. Here’s one fix: When the floor framing in your house is accessible and there’s a slight gap between the top of the floor joists and the subfloor, try using polyurethane construction adhesive (about $4 per tube) to silence the squeak (Photo 1).
Inject the constructive adhesive into the gap and work it deep with a plastic spoon so it flows toward the nail shanks that are causing the squeaks (Photo 2).