Moisture readings for internal walls can vary depending on the environment and construction materials used. However, generally, moisture readings should not exceed 15% for optimal indoor air quality and to prevent potential issues like mold and structural damage.
Window leaks can be a significant cause of high moisture readings in internal walls. Wind-driven rain, sealant failures, and cracks around the window frame can allow water to penetrate the wall cavity, leading to moisture buildup and structural damage.
It is crucial to address window leaks promptly to prevent moisture damage and maintain a healthy indoor environment. If you suspect a window leak, it is recommended to contact a qualified window repair specialist for inspection and repair.