If moisture returns after repeated caulk repairs, test the shower or tub as a system instead of adding another bead of sealant. Separate the supply plumbing, drain connection, overflow, valve penetrations, shower pan or tub flange, wall waterproofing, door/curb, and adjacent exterior sources so each

Yes. A hidden leak can exist even when the water meter is not visibly moving. Intermittent leaks, drain leaks, roof/exterior water, HVAC condensate, very small supply leaks, shared meters, or leaks that occur only during fixture use can all escape a simple meter check.

When noninvasive tests are inconclusive, the next step should narrow uncertainty rather than jump straight to broad demolition. Re-test under the conditions that trigger the leak, isolate systems one at a time, map moisture over time, and use the smallest targeted access opening that can confirm or

A professional leak investigation may use moisture meters, thermal imaging, pressure testing, acoustic listening, plumbing isolation, drain testing, tracer methods, roof or envelope testing, and targeted access. The correct tool depends on whether the suspected source is pressurized plumbing, drain

Thermal imaging is useful for finding temperature patterns that can be consistent with moisture, but it does not directly see water. Accuracy improves when the pattern is confirmed with a moisture meter, building history, plumbing or roof testing, and an understanding of insulation, sunlight, HVAC,

Explain what leak-detection tools can and cannot prove and how to escalate an inconclusive investigation.