To prevent indoor mold growth, focus on controlling which condition?

• A. Humidity
• B. Moisture
• C. Temperature
• D. Ventilation

Answer: (B)

Moisture availability drives indoor mold growth. Mold spores are everywhere, but they only become visible colonies when there’s enough liquid water or persistent dampness on surfaces or materials. That means sources like leaking pipes, roof leaks, condensation on windows or walls, and damp areas in basements or crawlspaces must be addressed to stop mold from taking hold. The most effective prevention is to control moisture: fix leaks, promptly dry any wet areas, improve drainage and waterproofing, reduce condensation with insulation or dehumidification, and keep indoor humidity at levels that discourage mold growth. Temperature and ventilation matter for how quickly mold grows, and they can help manage moisture, but without eliminating the moisture source, mold can still develop.