How can I detect and address water damage inside walls effectively?

To detect and address water damage inside walls effectively, you can look for signs such as discoloration, bubbling paint, or a musty smell. Use a moisture meter to check for high levels of moisture. Address the issue by fixing the source of the water, drying out the area with fans or dehumidifiers, and repairing any damaged materials. It's important to act quickly to prevent mold growth and further damage.