How Do You Handle Unexpected Mold Found During Renovation?

When you find mold behind a wall or under a floor, halt your renovation project immediately. Do not continue sanding, cutting, or demolishing in that space. Disturbing the mold releases microscopic spores into your home's air, which can settle elsewhere and create new colonies. Isolate the room by closing doors and covering HVAC vents with plastic sheeting and tape to prevent spore migration throughout your house. This initial containment is a vital first safety step.

Mold remediation is a controlled cleanup, not just wiping a surface. The pros will set up containment barriers and use specialized air filtration devices to capture airborne spores. They remove porous, moldy materials like drywall and insulation that cannot be properly cleaned. All remaining surfaces are then scrubbed with appropriate cleaning agents. The entire area is dried completely to a specific moisture level to prevent any chance of regrowth after the work is done.

• Seal the work area with plastic sheeting.
• Use negative air pressure and HEPA air scrubbers.
• Safely remove and bag all contaminated porous materials.
• Clean and disinfect salvageable structural surfaces.
• Dry all materials to a proper moisture level.
• Perform a final clearance test to verify the air is clean.

Contact your homeowner's insurance company to report the discovery. Mold coverage varies greatly between policies. Some may cover remediation if the mold resulted from a sudden, covered water event like a burst pipe. Policies vary, and your insurer decides what is covered. You will likely need to adjust your renovation timeline and budget to accommodate the mold work. Keep records of all assessments, repairs, and communications related to the incident.