Most historic peninsula homes are not slab-on-grade — they sit on raised foundations and crawl spaces. That changes where leaks hide and how they are found.
Under the floor, not under concrete
Supply runs in crawl spaces and between floors. A leak there soaks framing and heart pine long before it appears as a stain. Newer downtown construction and some ground-floor additions are on slab, so we confirm the construction type before choosing an approach.
Found without demolition
Acoustic listening, pressure isolation and thermal imaging locate the failure before anything is opened. In a house with original plaster and panelling, this is the difference between a small repair and irreversible damage to finishes. Nobody should be opening historic walls on a guess.
Confirm it yourself first
Shut every fixture and watch the meter. If it moves, water is going somewhere. That one-minute test is worth doing before you call anyone.
Humidity and rot
A slow crawl space leak in Charleston humidity does not stay a plumbing problem. It becomes rot in structural timber, which is a far larger repair than the pipe that caused it.