Why Does My Drywall Have Bubbles After Water Damage?

Water seeps through the paint or joint compound and reaches the paper layer of the drywall. Once the paper gets wet, it expands and loses its bond to the gypsum core. That expansion pushes the surface outward, forming bubbles or blisters that feel soft when you press them.

The longer the moisture sits, the more the drywall weakens. Even after the surface dries, the paper may stay wrinkled and the core may crumble. If the drywall has been wet for a while, the damage often goes deeper than what you can see on the surface.

Proper drying goes beyond wiping the surface. Water can travel deep into the wall and soak into the framing, insulation, and drywall on the other side. Without professional-grade dehumidifiers and air movers, moisture can stay trapped and cause ongoing damage.

Drying the area quickly is important, but how fast it dries depends on the amount of water, the building materials, and the local climate. In a mild marine climate, wet winters can keep things damp for long stretches, so prompt action is wise.

Once the drywall is repaired, focus on preventing the source of the water. Fix leaky pipes, seal around windows, and ensure your roof and gutters direct water away from the home. Regularly check under sinks and around appliances for early signs of moisture.

If a leak happens again, dry the area quickly and keep an eye out for any changes. Early action can make the difference between a simple repaint and a full wall replacement. Policies vary, and your insurer decides what is covered.