The short answer
What Drywall Is Made Of
Drywall has a core of gypsum, a soft mineral that is naturally porous. This core is pressed between two layers of heavy paper. The paper and gypsum both absorb water readily, which is why drywall soaks up moisture so quickly.
When water touches the surface, it does not just sit there. Capillary action pulls the water into the tiny pores of the gypsum and along the paper fibers. This means a small leak can make a large area damp in a short time.
How Water Moves Through Drywall
Water moves through drywall in two main ways. First, it seeps directly into the gypsum core through any exposed edge or cut. Second, it travels sideways along the paper facing, which acts like a wick.
The paper layers are especially good at spreading moisture. Once the paper gets wet, it can carry water well beyond the original source. This is why you might see a water stain that is much larger than the pipe leak behind the wall.
- Gypsum core is highly porous
- Paper facing wicks moisture sideways
- Capillary action pulls water inward
- Even small leaks spread quickly
- Wet drywall becomes heavy and sagging
- Moisture can travel up or down the wall
Why It Feels Spongy When Wet
Once drywall absorbs water, the paper layers swell and the gypsum core softens. The material loses its rigid structure and becomes spongy to the touch. You may notice it bowing or sagging under its own weight.
The longer the drywall stays wet, the more damage occurs. Mold can start growing on the paper surface, and the gypsum can crumble. That is why it is important to dry the area quickly and remove any soaked sections.
How to Dry Wet Drywall
If you catch a leak early, you can sometimes dry the drywall with fans and dehumidifiers. Open windows if the weather allows, and keep the air moving. Remove any wet insulation behind the wall, as it holds moisture against the drywall.
For larger areas, you may need to cut out the damaged sections. A water damage inspection can help you see how far the moisture has spread. In humid climates like Florida, drying can take longer, so act quickly.
When to Call the Pros
If drywall has been wet for more than a day or two, the damage is often too deep for simple drying. The paper facing may start to break down, and mold can take hold. In those cases, the pros usually remove the affected drywall and replace it.
The pros can also extract water from walls and floors using specialized equipment. They can assess the extent of the damage and help you decide what needs to be replaced. If you have a water stain or sagging ceiling, call for a water damage assessment.
- Wet drywall for over 48 hours
- Visible mold or musty smell
- Sagging or bulging sections
- Water stain that spreads or darkens
- Electrical outlets or switches affected
Water damage does not wait
Phones are answered 24/7 for Port St. Lucie and nearby communities.
Call Now (772) 758-7923Frequently asked questions
Can drywall dry out on its own?
Small areas might dry if you act fast with fans and dehumidifiers. But once the paper is soaked, it often stays damp and can grow mold. If the drywall feels soft or crumbles, it needs to be replaced.
How long does it take for drywall to dry?
Drying time depends on how wet the drywall is, the humidity, and airflow. In a humid climate like Port St. Lucie, it can take several days. If the paper is still wet after a few days, the drywall is likely ruined.
What should I do if my drywall gets wet?
Stop the water source first, then dry the area with fans and dehumidifiers. Remove any wet insulation and cut away soaked drywall. If the damage is large or mold appears, contact local water damage pros for help.
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