Wet Drywall After a Leak Dry It or Replace It?

The Quick Answer

Drywall soaks up water from the bottom like a sponge. Here is how to tell if it can be dried in place.

When Drywall Can Be Dried

• Wet with clean water
• Drying starts within 24 to 48 hours
• Still firm, not crumbling or sagging

When It Should Be Replaced

• Wet with gray or black water
• Soft, swollen or sagging
• Insulation behind it is soaked
• Mold is visible

Flood Cuts

Sometimes the bottom section is cut out so the wall cavity can dry, then new drywall is installed. This is common after flood damage.

How Long Drywall Takes To Dry

With professional air movers and dehumidifiers, drywall wet with clean water often dries in 2 to 4 days. Without equipment in Naples humidity, it may stay damp for a week or more, long enough for mold to start on the paper backing.

Insulation inside exterior walls can hold water against the drywall and slow drying. Sometimes small holes are drilled at the bottom of the wall to allow airflow into the cavity, which are easy to patch afterward. Moisture meter readings, not touch, are the only reliable way to know drywall is dry.