Floor Sagging & Bouncy Floors
Why Floors Dip, Bounce, and Feel Soft Underfoot
Sagging and bouncy floors are rarely caused by poor construction or undersized framing. In humid climates, they are most often the result of long-term moisture exposure. Wood framing absorbs moisture during wet seasons and releases it during dry seasons. This repeated expansion and contraction weakens the internal structure of the wood over time, reducing stiffness and load-carrying capacity.
As joists lose rigidity, they deflect more under normal household loads. Floors begin to feel soft, uneven, or springy. In many cases, homeowners notice these changes gradually and assume they are normal aging. Adding supports or jacks without addressing the weakened wood often produces only temporary improvement, as warped or cupped wood cannot be permanently straightened under pressure.
True repair requires reinforcing or replacing compromised framing members so load capacity is restored. Sistering new framing alongside damaged joists or rebuilding affected sections corrects sagging properly. However, structural repairs alone are not enough. If moisture cycles continue, even new wood will eventually weaken.
Permanent solutions combine structural reinforcement with moisture control. When humidity is stabilized and condensation is eliminated, repaired framing remains dry and strong. Floors regain their firmness, and movement stops progressing.
