Watch for
Damp wall or cabinet interior
Watch for
Musty smell or soft flooring
Watch for
Drip after rain, washing, or plumbing use
The same symptom can have several sources
Water in an RV may come from outside weather, a pressurized plumbing line, a drain connection, condensation, or an appliance. The right first question is what event makes the water appear. A leak after a storm has a different starting point than water under a sink after the pump runs.
Because RV walls and floors can hide moisture, drying the visible spot is not the same as solving the leak. The longer water remains in plywood, insulation, or trim, the more likely the repair becomes larger than a simple reseal.
What to record before the visit
Take a photo from a distance and a close-up of the wet area. Note the weather, whether the RV was level, whether the water system was pressurized, and whether any appliance had recently been used. Those details can save time when a symptom is intermittent.