A slab leak is a pressurized supply pipe failing inside or beneath a concrete floor. Most homes in this beach city were built between 1950 and 1980, and about 86 percent of the housing is more than 30 years old, so plumbing that has worked for decades is common. When a home sits on a slab and a pipe below it fails, the water moves up into the flooring and sideways under walls before anything looks wrong.
Start with the meter dial
The city's own leak check is simple: turn off all water in the house and look at the small dial on the water meter. If it keeps turning, water is leaving the pipes somewhere. The water meter leak test turns two readings into gallons an hour, which helps a plumber decide where to look.
Water service here is run by the city through its Public Works Department, which is available around the clock, holidays included, for problems on the city's water and sewer systems. Pipes inside the property are a job for a private plumber.
Signs that water is under the floor
- The meter dial turns with every fixture off
- A warm patch on tile or wood, often over a hot water pipe
- Damp carpet or a musty smell with no visible source
- Grout that cracks or boards that cup near one wall
- A utility bill that jumps for no clear reason
Seasonal and rental homes deserve a closer look. About half of the city's vacant homes are used for seasonal or occasional stays, and about 47 percent of occupied homes are rented, so a hidden leak can run for a while before anyone notices.
How the slab and the rooms get dried
The plumber repairs or reroutes the pipe; the drying team handles everything the water reached. Meters and a thermal camera map how far the water spread under the flooring. Pad, laminate and swollen baseboards over the wet area come up, while tile and wood are judged by their readings. Concrete is a Class 4 material, so LGR or desiccant dehumidifiers run with air movers, sometimes under plastic tenting, until the slab and the wall bottoms match a dry reference.
- Small vent holes behind removed baseboards to dry the wall bottoms
- Daily readings at the same marked spots
- Photos of every area before flooring comes up
Condos and shared buildings
Multi-family buildings make up 38.4 percent of the housing here, and a leak under one unit can reach the walls and floors of the next. The moisture map shows where the water started and where it went, which the association, the owners and each insurer need. Wet hardwood over the slab gets floor drying mats when the readings say it can be saved.
