How can I stop wooden floorboards from creaking?

Creaking floorboards are caused by boards rubbing against each other or against nails and subfloor joists as they shift underfoot. The right fix depends on whether you have access to the underside of the floor.

Common Causes

Seasonal humidity changes cause wood to expand and contract, loosening the original nails or creating small gaps between boards and joists. Foot traffic then lets the boards flex, and the resulting friction or movement against fasteners produces the familiar squeak.

Choosing a Fix

If the creak is mild and between boards, a dry lubricant worked into the seams may be enough. When you can reach the floor from a basement or crawl space, securing the subfloor to the joists from below is the most effective and invisible repair. If access from below is not possible, fastening the boards from above with trim screws or finishing nails is a reliable alternative.