How to Dry Out Walls and Prevent Water Damage
Water damage can weaken walls, cause mold growth, and lead to costly repairs. Drying out wet drywall, sheetrock, and insulation quickly is essential to prevent long-term damage. Here’s how to remove moisture and restore your walls effectively.
1. Stop the Source of Water
Identify and fix the water source before drying begins. A burst pipe, leaking roof, or floodwater must be stopped to prevent further damage. If the leak is inside the wall, you may need to cut a small opening to inspect the extent of the damage. Taking quick action can help minimize the risk of mold growth and costly repairs. If you're dealing with water damage in your home or business, professional restoration services can ensure thorough drying and prevent long-term issues.
2. Remove Excess Water
Use a wet/dry vacuum, towels, or mops to absorb standing water. If water has seeped into the walls, drill small holes near the baseboard to allow trapped water to escape. Removing excess moisture immediately prevents further absorption into drywall and insulation.
3. Increase Airflow
Air circulation is key to drying walls efficiently. Open windows, turn on ceiling fans, and place box fans near the wet walls to speed up evaporation. Industrial fans and air movers work best for large-scale water damage.
4. Use Dehumidifiers to Remove Moisture
A dehumidifier pulls moisture from the air and walls, preventing mold growth. Place a dehumidifier in the affected room and run it continuously for at least 24–48 hours. A moisture meter can help determine when the walls are completely dry.
5. Check for Hidden Moisture
Even if walls feel dry to the touch, moisture may still be trapped inside. Use a moisture meter to check deeper layers of drywall and insulation. Ignoring hidden moisture can lead to mold growth and structural damage over time.
6. Remove and Replace Damaged Materials
If drywall is sagging, crumbling, or discolored, it must be removed and replaced. Insulation that has absorbed water may lose its effectiveness and should also be replaced. Leaving wet materials in place increases the risk of mold and mildew.
7. Inspect and Dry Insulation
Some types of insulation can be dried using airflow and dehumidifiers, while others must be replaced. Fiberglass insulation may dry out, but cellulose and blown-in insulation often retain moisture and require full replacement.
8. Sanitize and Prevent Mold Growth
Even after drying, mold spores may still be present. Use a mild detergent or antimicrobial cleaner to sanitize affected areas. Applying a mold-resistant primer or sealer can help prevent future issues. If moisture lingers too long, mold can spread quickly and become a bigger problem. In cases where mold growth is already visible or has spread behind walls, professional mold damage restoration may be necessary to ensure complete removal and prevention.
9. Repair and Seal Drywall
Once completely dry, patch or replace damaged drywall, apply joint compound, and repaint with moisture-resistant paint. Sealing walls properly helps protect against future water damage.
Will a Dehumidifier Dry Out Damp Walls?
Yes, a high-powered dehumidifier is effective in pulling moisture out of drywall, insulation, and air. However, it should be combined with fans and proper ventilation for the best results.
How Long Does It Take for Walls to Dry?
Drying time varies depending on the extent of the damage. Mild water damage may dry in 24-48 hours, while severe damage can take several days to a few weeks with professional drying equipment.
When to Call a Professional
If walls remain wet after 72 hours, or if you notice mold, odors, or structural issues, contact a water damage restoration company. Professionals use industrial dehumidifiers, air movers, and moisture meters to ensure walls are thoroughly dried.
Final Thoughts
Drying out wet drywall, insulation, and sheetrock quickly helps prevent long-term damage and mold growth. By using fans, dehumidifiers, and proper ventilation, you can restore walls and protect your home from further issues. If the damage is severe, seeking professional help is the safest option.