To address interior wall moisture and leakage, first identify the source using a moisture meter or thermal imaging. Repair leaks in pipes, windows, or roofs promptly. Install vapor barriers, apply waterproof sealants, and improve ventilation with exhaust fans or dehumidifiers. For severe cases, consult a professional to install moisture-resistant materials or systemic solutions like sump pumps. Regular inspections and maintaining a relative humidity level below 60% are critical.

Moisture and leakage in homes cause significant structural damage and health risks. According to the Environmental Protection Agency (EPA), unresolved moisture issues can lead to mold growth within 24–48 hours, triggering respiratory problems like asthma. A 2021 study in the Journal of Building Engineering found that 60% of moisture-related leaks go undetected for months, costing homeowners an average of $5,000 in repairs. The International Institute of Cleaning and Restoration Certification (IICRC) emphasizes that proper moisture control reduces energy loss by up to 30% through improved insulation and reduced HVAC strain. Additionally, the CDC links chronic moisture exposure to 24% of indoor air quality issues, including allergen proliferation. Proactive measures, such as sealing gaps and using humidity monitors, are cost-effective: a 2019 Harvard study showed a 40% decrease in leakage-related insurance claims in homes with routine moisture management. Prioritizing these steps safeguards property value, health, and long-term energy efficiency.