What Causes Squeaky Floors. Squeaky floors can be caused by physical damage to the floor change in humidity old age poor installation or subfloor problems. Cause of squeaky hardwood floors 3.
The loosely placed nails of the joist may also squeak. Annoying floor squeaks common in many homes typically occur after the house has settled and flooring lumber has dried out and shrunk. Uneven subflooring can cause gaps between the floor and the subfloor.
The primary causes of squeaky floors are subflooring that is moving and environmental changes with the main floor or subfloor.
When walking on a wood floor the up and down movement can cause squeaky flooring. The loosely placed nails of the joist may also squeak. Uneven subflooring can cause gaps between the floor and the subfloor. In this case when you put weight on the floor the subfloor rubs against the flooring joists causing the floor to squeak.
