Squeaky hardwood floor repair

Almost never. Where there is access from below through a basement or crawlspace, we can fix the connection without touching the finished floor at all. Where there is not, there are discreet from-above methods that address the fastener through the flooring with a very small, repairable point of entry. Lifting a hardwood floor to stop a squeak is a last resort, not a starting point.

That is the single most common pattern we see, and it is normal wood behaviour rather than a defect. Hardwood gives up moisture when indoor air dries out during the heating season and shrinks slightly, which loosens the fasteners holding it. It is still worth fixing, because the seasonal cycle gradually makes the movement worse rather than better.

No, and the difference matters. Solid hardwood is usually blind-nailed through the tongue, so squeaks concentrate at the fastener. Engineered hardwood is frequently floated or glued down, so the noise more often comes from a separated seam or from the subfloor beneath rather than from the flooring layer itself. We establish which you have before recommending anything.

It will slow the problem down but it will not fix an existing one. Keeping indoor humidity more stable through the winter reduces how much the wood shrinks and therefore how fast fasteners loosen, which is genuinely worth doing. But once a fastener has already lost its grip, adding moisture back does not restore it. The mechanical connection has to be remade.

Slowly, yes. A board that is free to move is wearing against a fastener or against its neighbour every time it is walked on, which gradually enlarges the fastener hole and can wear the tongue and groove edge. It is not urgent, but a squeak generally gets worse rather than settling down on its own.