The old carpet is gone. The room looks worse, sounds familiar, and is briefly more accessible than it will be for years. This is a useful moment to walk slowly.
Make a map while the room is empty
Mark repeatable noises and note where a second person can observe from below. Weyerhaeuser's squeak guidance describes multiple causes within floor systems. The subfloor, framing, and nearby components can each contribute.
Do not turn diagnosis into random fastening
Ask the installer which interface is moving and how the proposed repair addresses it. Confirm concealed pipe and cable locations before any fixing. Damaged or altered engineered members need an appropriate repair detail. Photograph completed work and repeat the walking check before underlay and flooring hide it.
Before the next step
- Mark noises before the installer covers the subfloor.
- Identify the source and safe fixing locations.
- Repeat the same walking check after the repair.
New flooring changes what you see. Use the open-floor interval to deal with what you hear, with a realistic description of what the repair can achieve.