The 48-Hour Rule
Mold can begin growing on wet drywall within 24-48 hours in Florida's humidity. This isn't a maybe. It's a near certainty during our warm months.
If your drywall got wet during a hurricane and stayed wet for more than two days, assume mold is present even if you can't see it. The spores can be inside the paper facing before any visible growth appears.
Rachel's ceiling looked fine for almost a week. The mold was growing on the back side where she couldn't see it.
Document Before You Touch Anything
This is where people mess up their insurance claims. Before you start drying, cutting, or removing anything, document the damage.
- Photos of all affected areas with timestamps
- Video showing extent of damage
- Measurements of affected areas
- Notes on where water entered
Your insurance adjuster needs to see the damage as it was, not after you've started repairs. I know it feels wrong to leave wet drywall sitting there, but getting your claim denied because you can't prove the extent costs more than a few extra hours of moisture.
Assess the Damage
Water travels in weird ways through homes. A roof leak during Matthew might show up in a ceiling below, but the water could have run along rafters and soaked into walls 10 feet away from the visible stain.
Check areas adjacent to obvious damage. Push on drywall to feel for soft spots. Look for warping at seams. Water stains aren't always visible, but the drywall will feel different.
A moisture meter helps here. Anything reading above 15% moisture content is still too wet and potentially growing mold.
When to Repair vs Replace
Minor water exposure that dried quickly (within 24 hours) can sometimes be saved. The drywall should be completely dry, show no signs of staining on both sides, and have no musty smell.
Replace if:
- Water exposure lasted more than 48 hours
- Any visible mold, even small spots
- Drywall is soft, crumbly, or warped
- Paper facing is peeling or bubbling
- Musty smell that doesn't go away after drying
When in doubt, cut it out. Drywall is cheap. Mold remediation isn't.
The Actual Repair Process
Once you have insurance approval and documentation:
1. Cut out damaged drywall at least 12 inches beyond visible damage. Mold spreads further than you can see.
2. Inspect and treat framing. Spray exposed studs with a mold-killing solution. Let dry completely.
3. Check insulation. Wet insulation usually needs replacement.
4. Wait until everything is completely dry. Use dehumidifiers and fans. This might take days in Jacksonville humidity.
5. Install new drywall. Consider using mold-resistant drywall for the replacement section even if not required.
6. Tape and mud. Follow standard practices but account for our humidity on drying times.
Specific Jacksonville Concerns
The St. Johns River flooding affects homes differently than roof leaks. River water brings in contaminants that pure rainwater doesn't. If your water damage came from flooding rather than wind-driven rain, you may be dealing with additional contamination beyond just mold.
Homes in the Beaches area deal with salt air year-round, which affects how materials hold up. Post-hurricane repairs near the ocean should use materials rated for coastal conditions.
Older homes in Riverside and San Marco may have original plaster rather than drywall. The repair approach for plaster is completely different, and those walls have survived plenty of hurricanes already.
Insurance Claim Tips
Keep receipts for everything: materials, equipment rentals, contractor invoices. If you're doing the work yourself, track your hours and materials separately from labor.
Get multiple repair estimates before starting work if your insurance requires it. Some policies have preferred contractor requirements.
Follow up persistently. After major storms, adjusters are overwhelmed. The squeaky wheel gets processed.