Start with the signs.
A change you have noticed is enough to begin. Use these notes to make the concern clearer.
Pressure keeps dropping
A heating gauge tells you there is a change, not where it begins.
Damp keeps coming back
A new coat of paint can hide the mark while the cause remains.
The meter keeps moving
Unexplained movement is a reason to check the possible uses and routes.
The floor feels damp
Water may travel below a finish before it becomes noticeable.
A ceiling mark is spreading
The stain is an observation, not a source location.
The bill has increased
Consumption, readings and leakage all need consideration.
The garden stays wet
A persistent wet patch needs its water source explained.
Water appears on the drive
The visible water may have followed a hidden route.
Water appears after showering
The delay after use can help separate possible causes.
A patch of floor feels warm
A temperature difference needs context.
You hear unexplained water
Sound can travel through a building and its pipework.
Water flow seems weaker
A change at the tap may have several explanations.
Water may be coming from above
Access to the likely source matters as much as access to the stain.
A leak follows building work
Recent changes provide a useful investigation history.