Mold after water damage

The 24–48 hour rule

The EPA says that in most cases mold will not grow if water-damaged areas and items are dried within 24–48 hours. After that, porous materials like drywall, insulation, ceiling tiles and carpet pad are often easier to remove than to save.

When to call a professional

• The affected area is large. The EPA says you can usually handle areas under about 10 square feet yourself.
• The water was sewage or otherwise contaminated.
• Mold may be in the heating and air ducts.
• Someone in the home has asthma, allergies or a weakened immune system.

EPA cleanup basics

• Fix the water problem first, or the mold will come back.
• Scrub mold off hard surfaces with detergent and water, and dry completely.
• Throw out absorbent materials, such as ceiling tiles and carpet, that have become moldy.
• Don't paint or caulk over mold.
• Wear an N-95 respirator, gloves and goggles.

In North Shore basements

Finished basements with carpet, paneling and drywall are where hidden mold most often follows a backup or seepage event. Keeping basement humidity down with a dehumidifier, and fixing the drainage problems your village recommends (window wells, downspouts, sump backups), reduces repeat moisture.

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