Baseboard
Water at the baseboard travelled to get there.
A wet shoe moulding is rarely the start of the story. Water follows the lowest edge it can find, including the gap under drywall.
By ProShield Leak Detection Inc. · Updated
Photograph the run before you mop it all away.
Note which wall, how long the wet edge is, and whether it is cold, warm, or dirty.
Ask whether a fixture above or beside it was used.
A shower, a washer, or a heater closet next door changes the suspect list.
Do not pull the baseboard as a test.
You can make a small leak look like a large one and lose the stain map.
Questions people ask
Is this always a slab leak?
No. Walls, patio doors, and overflows also wet baseboards.
Can I run a fan along the trim?
After the source is controlled. Drying first can hide an ongoing leak.