Match the Basement Fix to the Moisture Source
Water seepage, moisture passing through a slab and humid air can need different responses. Identify what is getting wet before covering walls or choosing equipment.
Map where and when moisture appears
Note wet areas at the wall-to-floor joint, visible plumbing leaks and any relationship to rain. Check roof runoff and exterior drainage before assuming the problem can be solved from inside. Photos taken at the same spots after different weather can help explain the pattern.
Address water entry before adding finishes
Recurring water intrusion needs to be corrected before installing moisture-sensitive finishes. A surface coating alone will not solve a high water table or poor site drainage. Have cracks and persistent seepage assessed as part of the full water-management plan.
Radon testing should be considered before and after basement retrofit work so any needed mitigation can be included in the project.
Use humidity control for the air-moisture problem
Track relative humidity with a hygrometer. EPA recommends keeping indoor humidity below 60%, ideally 30–50% when possible. A properly selected dehumidifier can help control humid air after water sources are addressed.
Keep stored items away from damp surfaces and check vulnerable corners regularly. Persistent dampness or musty odor deserves investigation rather than concealment behind new paneling.
Your next step
Sort your observations into liquid water, damp materials and humid air. Bring that record to the contractor so the proposed fix addresses the actual source.