Moisture readings for internal walls should ideally be below 15%. Readings between 15% and 20% indicate elevated moisture levels that may require investigation, while readings above 20% signify a moisture problem that necessitates prompt attention.
Elevated moisture levels in internal walls can result from various factors, including water leaks, condensation, or poor ventilation. Prompt identification and rectification of moisture issues are crucial to prevent structural damage, mold growth, and health risks. If you suspect moisture problems in your home, it is recommended to seek professional assistance from a qualified inspector or contractor.