The short answer
Why a Hair Dryer Isn't Enough
A hair dryer pushes warm air over a small area, so it only affects the top layer of the drywall. The water inside the gypsum core stays trapped, which keeps the material soft and prone to damage. Even if the surface feels dry to your touch, the inside can remain saturated for days.
Heat from a hair dryer can also cause the paper facing to dry faster than the core, leading to cracking and peeling. That uneven drying makes the drywall weaker and harder to repair later. In a humid climate like Rockwall's, trapped moisture can quickly turn into a bigger problem.
What Works Better for Wet Drywall
For small, surface-level dampness, you can try increasing airflow with fans and opening windows if the outdoor air is dry. A dehumidifier helps pull moisture from the air, which speeds up the drying process. Keep the room warm but not hot, and check the drywall daily for soft spots.
If the drywall is visibly soaked, has sagged, or has been wet for more than 24 hours, removal is usually the safer route. Cut out the affected section and let the framing dry completely before installing new drywall. This prevents hidden mold growth and structural weakening.
The pros use industrial dehumidifiers and moisture meters to dry out wall cavities properly. They can also test whether the drywall has lost its integrity. For a small spot, you might manage with fans, but for anything larger, professional help is wise.
- Use fans to keep air moving over the wet surface
- Run a dehumidifier in the room for several days
- Check for soft spots by pressing gently on the drywall
- Look for dark staining or bubbling in the paper facing
- Cut away any section that feels mushy or crumbles
- Dry the wooden studs behind the drywall before closing it up
When to Cut Out the Drywall
You should consider removing the drywall if it has been wet for more than a day, if the water came from a sewage backup, or if you notice any signs of mold. Wet drywall loses its structural strength, so it may not hold screws or paint properly even after drying.
Cut back the drywall at least 12 inches beyond the visible water stain to ensure you remove all the damp material. Check the insulation behind it, as wet insulation can hold moisture against the framing. Replace any that is soaked, and let the cavity dry before installing new drywall.
How to Dry the Wall Cavity Properly
After removing wet drywall, you need to dry the wooden studs and the inside of the wall. Point fans into the open cavity and run a dehumidifier nearby. Let it dry for several days until a moisture meter reads below 15 percent on the wood.
Do not close up the wall until everything is completely dry. If you seal in moisture, you create a perfect environment for mold and rot. The pros use specialized drying equipment to speed up this process, but you can manage a small area with patience.
Once the cavity is dry, you can install new drywall and finish it to match the surrounding wall. Make sure the source of the water is fixed first, or you risk repeating the whole process.
- Leave the wall open until the wood feels dry
- Use a moisture meter if you have one
- Keep the area ventilated for several days
- Replace any wet insulation before closing the wall
- Prime the new drywall before painting
When to Call the Pros
If the wet area is larger than a few square feet, or if the water has been sitting for more than a day, professional help is the safer choice. The pros have industrial dehumidifiers and moisture meters that can dry a wall cavity thoroughly and quickly.
They can also inspect for hidden damage in the framing or insulation that you might miss. Water damage can spread behind walls and into floors, so a thorough check is worth the cost. Don't wait too long, as mold can start growing within 24 to 48 hours.
If you notice a musty smell, see dark spots, or feel unwell, see a doctor if needed and consider having a mold professional assess the area. Acting quickly and getting the right help can prevent a much larger problem.
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Call Now (469) 698-4610Frequently asked questions
How long does it take for wet drywall to dry?
It depends on how wet the drywall is and the airflow in the room. Surface moisture can dry in a day with fans, but the core may take several days. If the drywall stays wet for more than 24 hours, mold risk increases. Use a dehumidifier to speed up the process.
Can I save drywall that has been wet for a while?
If the drywall has been wet for more than 24 hours, it is often safer to replace it. The gypsum core can weaken and harbor mold even if the surface looks dry. Check for softness or discoloration. If you have any doubt, cut it out and install new drywall.
What should I do if I see mold on wet drywall?
Stop trying to dry it and treat the area carefully to avoid spreading spores. You may need to remove the drywall entirely. A mold professional can assess the extent and recommend safe removal. Keep the area well-ventilated and avoid touching the mold with bare hands.