Homeowners insurance often covers a slab leak only in part. Most policies pay for the sudden, accidental resulting damage, such as opening the concrete slab to reach the failed water line, but not the worn-out pipe itself, and not damage from gradual, long-term seepage. Coverage depends on your policy.
The split that decides most claims is sudden versus gradual. A slab leak that bursts without warning is usually treated as sudden and accidental, so the policy may pay to open the floor, dry the structure, and repair water-damaged finishes. A leak that seeped for months before anyone noticed is often denied as gradual damage or wear and tear. The failed pipe section itself is rarely covered, because insurers treat it as a maintenance item and pay only for the resulting damage.
The Insurance Information Institute lists accidental discharge or overflow of water from a plumbing system as a covered peril, and says a policy will not cover damage from a lack of maintenance. That is the line most claims fall on: a sudden break is often covered, while slow seepage reads as neglect, and the pipe repair itself usually stays your cost. Texas policies vary, so read your dwelling coverage and exclusions first, and document any leak with photos, since a claim turns on proving the damage was sudden. Electronic leak location pinpoints the break, and professional water leak detection shows whether it is a fresh failure.
One honest limit: no guide can say whether your claim will be paid, because it hinges on your policy wording and how the adjuster reads the cause. If you are unsure whether the water under your foundation is a supply line or a drain, knowing what a slab leak is helps you describe it accurately when you file.