What Is a Slab Leak? Causes, Signs, and Solutions
Wondering what a slab leak is? Learn the causes, warning signs, and best repair solutions from someone who’s been there—plus practical tips to protect your home and plumbing.
If youve never heard of a slab leak, trust meyoure not alone. I didnt know what it was either until I noticed warm spots on my floor and my water bill mysteriously doubled overnight. A slab leak sounds fancy, but its really just a leak in the water pipes beneath the concrete foundation (or slab) of your home. And let me tell you, it can cause major damage if you dont catch it early.
What Causes a Slab Leak?
In my case, it was corroded copper pipes, but slab leaks can happen for a variety of reasons:
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Poor installation: Pipes that were bent or kinked during installation can wear down over time.
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Soil movement: Shifting ground (hello, Texas clay!) can crack pipes under the slab.
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Corrosion: Especially in older homes with copper piping.
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Abrasion: Pipes rubbing against concrete can wear thin and eventually leak.
Warning Signs to Watch For
I wish I had known the signs sooner. Heres what I noticedand what you should watch for too:
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Unexplained high water bills
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Warm spots on the floor
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Mildew or damp carpet
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Cracks in walls or flooring
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Low water pressure
Pro tip: If your floor feels like its heating up in one random spot, thats not a ghostits probably a leak.
Slab Leak Solutions (What Actually Worked for Me)
I called a professional plumber (definitely not a DIY job), and here are a few options they offered:
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Spot repair Best if the leak is small and easy to reach.
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Re-piping or rerouting Ideal for older homes or repeated leaks.
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Tunneling under the slab Expensive, but avoids tearing up your flooring.
I chose rerouting, and while it wasnt cheap, it gave me peace of mind.
Helpful Tips (Learn from My Mistakes!)
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Get multiple quotes: Prices vary wildly.
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Use a leak detection specialist: Theyll find it faster and with less damage.
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Check your insurance: Some policies cover slab leaks, some dont.
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Act fast: Water damage waits for no one.
FAQs About Slab Leaks
Q: How serious is a slab leak?
A: Very. Left untreated, it can cause major structural damage and mold growth.
Q: Can I fix a slab leak myself?
A: Honestly, dont. This is a job for professionals with proper equipment.
Q: How much does it cost to repair?
A: It ranges from $500 to over $5,000 depending on the method and damage extent.
Q: Will homeowners insurance cover slab leaks?
A: Sometimes! Check the fine printcoverage varies by policy and provider.
