A concealed leak is suspected behind original finishes
Ask whether the investigation can first narrow the source with appropriate surface observations. Thermal imaging records surface temperature, not water inside walls.
Explain why retaining the finish matters
Tell the investigator which finished surfaces the owner wants to retain and where authorized access already exists. That helps define the question, but it cannot guarantee a finding without opening a surface. Thermal patterns need moisture confirmation, while acoustic observations need a relevant suspected line and suitable conditions.
An inconclusive survey is a finding worth naming
Ask the report to distinguish confirmed evidence from a possible source. If the available observations do not justify an opening location, ask what information would narrow it. The next choice may be additional authorized access or a different source inquiry rather than assuming an attractive image completes the diagnosis.
What the chosen detection method establishes
A thermal image is not proof of water or a guarantee that no opening will be required. Acoustic findings depend on conditions and need corroborating evidence.
Related service information
Old Naples area guide and thermal & acoustic leak detection. Our Naples water leak service homepage explains the wider scope.