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Slab Leak

A leak under concrete keeps saturating the fill beneath the house until it's located and shut off, so it isn't something to watch for a few weeks.

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When this becomes an emergency

What a pro does

Slab construction is the exception rather than the rule through much of this metro, since basements are standard in the older neighborhoods on both sides of the river. Where slab leaks do come up it's in postwar ranches and the newer subdivisions built out toward Fern Creek, Okolona and across into Clarksville and Sellersburg. The plumber's first task is confirming the loss exists. Isolating the house at the main and watching the meter proves whether water is leaving the system before anyone considers opening concrete. Location is done with acoustic listening gear, sometimes with the line charged with air to make the escape point audible through the slab. Copper buried in soil corrodes from the outside where the ground chemistry works against it, which is why these leaks turn up in houses nobody has ever renovated. Once the spot is fixed, the choice is between cutting a small opening in the floor or abandoning that buried run and rerouting the line overhead. Age of the system usually settles it, because a pipe that's failed once in the ground tends to do it again.

Frequently asked questions

Building practice changed by neighborhood and era. Older streets closer to the river center went deep, while a lot of postwar and later development, particularly in the outer suburbs on both sides, was built on grade instead. The vintage of the house is the best clue.
By listening. Water escaping under pressure makes a sound that specialized equipment can pick up through the slab, and isolating and pressure testing individual sections narrows down which line is involved. That work is done before anything is cut.
It varies by policy, and insurers commonly treat the pipe repair, the concrete work, and the water damage as separate questions. Your insurance provider is the only one who can tell you what your coverage includes, so contact them early in the process.
It depends on the pipe's condition. A single defect on an otherwise sound system can be repaired where it is. When the buried copper is old and has thinned generally, running new line overhead removes it from the soil entirely and avoids a second slab opening later.

Slab Leak?

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