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Plumber repairing a slab leak.

Slab Leak Repair Services in Seattle, WA

over 4540 reviews

Are you dealing with water pooling, strange stains on your walls, or moisture that keeps coming back no matter what you try? You may be dealing with a slab leak in your walls or under your flooring. Call 206.792.7495 for expert Seattle slab leak repair and honest, upfront pricing.

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A slab leak has the potential to cause major damage to your concrete slab foundation, so picking up the phone as soon as you spot any warning signs is always the safest choice. Even minor leaks can turn into serious water damage quickly, especially when they spread beneath flooring or flow into hidden areas of your plumbing system.

When you suspect an issue, call Gene Johnson for immediate slab leak detection using advanced leak detection technology designed to locate the exact location of the problem efficiently.

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Outdoor Waterline Replacement

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Bathroom Refresh – Buy 3 Fixtures, Get the 4th FREE

Upgrade your bathroom’s look and feel. Replace any three fixtures (faucet, toilet or showerhead) and get the fourth one absolutely FREE. Fresh style, better performance and more savings!

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Tankless Water Heater Instant Rebate

Upgrade to endless hot water and energy efficiency. Get $250 off your new tankless water heater installation and enjoy free maintenance for the first year, all in one unbeatable offer!

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No Payments for 12 Months

Enjoy a new high-efficiency HVAC system without the upfront cost. Call today and start saving on energy instead of your comfort.

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Book today and we aren’t able to get out within 24 hours your dispatch fee is waived.

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Have a quote that’s just not sitting right? Don’t just settle! Let us come out and take a look at no extra cost to you.

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We fix or YOU DON’T PAY

Your dispatch fee goes toward the cost of repairs or replacement and if we can’t solve the problem, we waive it completely. Call today for risk-free service!

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$250

Replacement of tankless or storage type water heater.

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*Cannot be combined with any other offers or discounts. Coupon must be presented at time of payment. Not valid for trip charge or diagnostic fee. Valid on standard pricing only. Redeemable for one-time use per home.

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*For 60 months on select services.

When you call us for slab leak repair, you can expect a professional approach that balances efficiency, care, and long-term solutions. Our experienced team follows a repair process built to protect your home and minimize disruption while delivering sustainable solutions.

From start to finish, we focus on safety, quality, and minimizing disruption. Our goal is to protect your home’s foundation and structural integrity while resolving the leak efficiently.

What Are the Early Signs of a Slab Leak that Homeowners Should Watch for?

There are several warning signs that point to a slab leak, and understanding slab leaks early can help prevent foundation damage. Homeowners should keep an eye out for the following:

  • Unexplained spikes in your monthly water bill
  • Damp spots or warm areas on floors, especially near a concrete slab
  • Water pooling in your yard or foundation perimeter
  • Mold or mildew growth in the basement
  • Reduced water pressure throughout your home
  • Sounds of running water when fixtures are off

If you notice any of these, call a professional leak specialist right away. Slab leaks can remain hidden for long periods, and the longer you wait, the more costly repairs may become due to extensive damage that spreads beneath the slab foundation.

What Usually Causes a Slab Leak in a Home?

Slab leaks usually come from a mix of aging plumbing materials, shifting soil, and water pressure issues. Over time, the water pipes beneath the concrete slab may corrode or weaken, leading to leaks under the slab foundation. Shifting soil can move the lines enough to crack them, especially if the plumbing system was subject to poor installation during construction. In some cases, water leaks do not show up for years. Whether the cause is corrosion, soil beneath the home shifting, or improper installation, professional leak detection ensures the problem is found and handled before structural integrity is affected.

How Serious Is a Slab Leak if It’s Not Repaired Quickly?

A slab leak should never be ignored. When water escapes under the slab foundation, it slowly erodes the soil beneath the home and can cause the concrete slab to shift. This can create cracks in the foundation and threaten your home’s structural integrity. Slab leaks also lead to mold growth, mildew growth, damaged drywall, and unsafe flooring conditions. Electrical systems and HVAC equipment might suffer water damage if the leak spreads far enough. By the time the first sign becomes obvious, the repair slab leaks process can be more involved. Acting quickly helps save money and prevents the problem from becoming overwhelming.

What Kind of Damage Can a Slab Leak Cause?

Most homeowners fear mold, and for good reason. Basements and crawl spaces affected by slab leaks often become breeding grounds for mold and mildew, which can create health concerns. Beyond that, slab leaks cause serious water damage to floors, walls, electrical circuits, and structural elements of the house. Rotted wood, saturated soil beneath the home, and weakened support beams are all possible outcomes. Since this kind of leak can continue quietly for months, the damage may be significant by the time someone notices. Calling for professional leak repair as soon as hidden leaks are suspected helps prevent costly repairs later.

How Long Does It Take to Repair a Slab Leak?

Repair time varies because slab leak repair depends on the severity of the leak, the exact location, and the chosen repair method. Some minor leaks can be repaired in a single day, especially if they are easy to access. More complex cases, such as rerouting water pipes or replacing large sections under the concrete slab, can take several days.

Factors like accessibility, trenchless options, pipe lining, or flooring removal may also affect the timeline. The good news is that professional plumbers prioritize minimizing disruption and explaining the steps clearly so you always know what to expect throughout the repair work.

Can Slab Leaks Be Prevented, or Are They Just Unavoidable?

While some slab leaks occur naturally over time, homeowners can still take preventive measures to reduce the risk. Regular plumbing inspections help catch small issues before they become hidden leaks. Maintaining healthy water pressure prevents pipes from weakening prematurely. If your home contains outdated plumbing materials, upgrading to modern piping may help prevent future leaks entirely.

Watching your water bill closely also helps because an unexplained increase is often the first sign of trouble. Prevention cannot guarantee that slab leaks will never happen, but it significantly reduces the chance of extensive damage.

Do You Offer Emergency Slab Leak Repairs?

Some slab leaks cannot wait. Emergency plumbing situations like slab leaks, open pipe leaks, or major pipe bursts under a concrete slab need immediate attention before costly damage spreads.

Thus, we offer 24/7 plumbing emergency response throughout Seattle, WA, so homeowners never feel left alone during a crisis. When you hear running water beneath the floor or notice mildew growth, warm spots, or sudden flooding, we respond quickly with advanced tools and a plan to stop further damage.

Why Choose Gene Johnson for Expert Slab Leak Repairs

Seattle homeowners want trustworthy, efficient service when dealing with plumbing issues beneath their concrete slab. Our company specializes in understanding slab leaks and providing reliable solutions backed by professional leak detection, advanced tools, and experienced technicians.

  • Accurate leak detection using specialized equipment and advanced leak detection technology.
  • Skilled technicians trained to repair slab leaks safely and efficiently.
  • Minimally invasive repair options that prevent unnecessary demolition and protect flooring.
  • Transparent pricing and honest repair options explained clearly.
  • High-quality materials used for long-lasting repairs and sustainable solutions.
  • Fast, responsive service focused on customer satisfaction and protecting structural integrity.

We strive to deliver reliable slab leak repair services that keep your home’s foundation safe. Our team works carefully, communicates openly, and ensures every repair process is completed with the highest level of professionalism.

Dealing With a Slab Leak Emergency? Call Gene Johnson Now!

A slab leak can go from inconvenient to overwhelming in a short period of time. Once water begins seeping beneath your home’s foundation, the damage spreads fast, impacting flooring, electrical systems, and even the structural integrity of the building. Quick action is important because delaying repairs may increase repair costs drastically.

Our experienced team at Gene Johnson is available whenever you need fast help. We offer emergency slab leak repair services throughout Seattle, responding with advanced tools and an experienced team trained to stop further damage. Whether it is late at night or during a weekend, we act quickly to find the leak, repair it, and stabilize the situation. Do not wait until the problem escalates; call us right away.

When you call 206.792.7495 in the Seattle, WA area, Gene Johnson Heating, Cooling, Plumbing, and Electrical will send a licensed plumber to take care of the problem immediately!

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QUALITY SERVICE

Within Your Budget

The best plumbing, cooling, heating, and electrical services shouldn’t have to break the bank. That’s why we are happy to provide our customers with opportunities to save on their next service with us. Our current online deals are updated periodically, so there is something for everyone, whether you are a first-time customer or a long-time loyalist.

Here are some benefits of trusting Gene Johnson with your HVAC, Plumbing, and Electrical needs.
  • Best value service in Seattle
  • Always on-time arrival
  • No mess left after a job
  • Friendly team that truly cares about your safety and comfort
  • Fixed right guarantee
  • Upfront pricing
  • Follow up calls to ensure your peace of mind
  • Range of service options- no ultimatums!

Total reviews: 4540 | Average rating: 4.8

5

The technician came out on Xmas Eve to repair our hot water heater. He was friendly and professional. Highly recommend this company.

5

Gene Johnson is a great company, not only for their great prices but for their wonderful customer service! Our toilet was backed for almost a week while my wife and I tried to look for reasonable price but we settled on Gene Johnson. The plumber that came out to fix our issue, Armando, really brightened our day and did a fantastic job 💪! Thank you Armando and thank you Gene Johnson !

5

Branson Carr came out to install a new water heater. He did a phenomenal job. Really worked hard to restore hot water to the residence. He was professional and worked extremely hard. Would recommend.

5

Jaren Larson helped unclog a sink that was extremely difficult and we greatly appreciated his professionalism. He was transparent about pricing and the next steps if he was unable to get the sink flowing again. 100% would recommend him. Appreciate you Jaren!

4

Did a good job on trouble shooting our thankless water heater thank you.

5

Branson Carr was extremely knowledgeable and helpful during the service call for my hot water heater. He got it back up and running and gave us some great advice for maintenance going forward. We are extremely pleased.

5

Mike was helpful with explanations and advice on top of the job well done. We are grateful to have benefited from his experience and expertise.

5

Mike was awesome super friendly gave great advice and got the job done quickly. Thank you Mike and Gene Johnson for taking care of us

5

Jaren was great. We called this AM, arrived this afternoon, on time, fixed 3 issues. Was great to work with, would definitely recommend.

5

Jaren showed up and saved the day. Kind, informative, and quick. 11/10

5

Gene Johnson has done plumbing work for us in the past so we called them to come out and address what we thought was a smelly drain. Mark O. came yesterday and worked so hard to find the cause of the funky odor. He went above and beyond, exhausting all efforts, explaining everything to me along the way. In the end, nothing was found that would indicate there was an issue with our plumbing. Mark provided a few options without making me feel pressured to make an immediate decision. He was apologetic about not being able to find and fix the issue, but he really did make every effort and I was at least glad to know that our plumbing seems to be in good shape. Thank you, Mark!

5

Jaren did an awesome job. Fixed my issue efficiently and to my satisfaction. Highly recommend Jaren and Gene Johnson Plumbing.

5

Mark Ochoa was amazing dealing with a complicated issue in my basement bathroom and got us back in business. It was not a fun job. Really appreciate you Mark!

5

I had an emergency water heater leak and called for help. Joe came out and got the old water heater removed and new one installed. He was very helpful and informative, I appreciate him getting this resolved so quickly. I’ll definitely use Gene Johnson again!

5

We had a new installation of a tankless hot water heater by Steven Fritz today and it was an amazingly painless and actually interesting procedure! He was very thorough and explained things fully and carefully and got the job done in a single day. Really impressive!

5

We discovered very early in the morning that our hot water tank was leaking. I called Gene Johnson plumbing. The scheduler was efficient and thorough. About 15 minutes after I ended that call I received one from Pavel along with an email that he was on his way. He assessed the situation and got right to work. We now have a very functional new hot water heater, thanks to Pavel and Nathan. They were very knowledgeable and professional. Would happily recommend their services to friends and family.

5

Jaren came out today to fix our bathtub, which was significantly clogged. This was my first-ever experience calling a plumber, and it was terrific from start to finish. The person I spoke with to book was friendly and efficient. They were able to get me in the same day, and I appreciated receiving a text letting us know when the plumber would arrive, along with a picture of who would be coming. I also appreciated Jaren calling us to let us know he was going to be early and to check with us if that was okay. Jaren was kind, patient, and knowledgeable. He did a fantastic job all around. He had excellent communication with us and our HOA, and this was the best experience I’ve ever had with someone coming into my home for repairs. I am so happy my bathtub is back to normal, and I will recommend Gene Johnson to any of my friends and family. Jaren honestly made a nightmare situation manageable and even pleasant! Thank you again so much!

5

Your company has been here before! Great people! Great service ! Waiting for you guys now 👍

5

Gene Johnson is incredible to work with. They assigned me a human customer care rep through text message named Samara who has been so amazingly helpful and caring during this whole frustrating leak process. Our technicians Greg and Rory who visited us a few different times were simply amazing, so understanding, and always helpful with an extremely positive attitude even when new issues arose. Tyler, the waterline team leader and expert, was so accommodating and understanding and made sure to set things up for me with Samara for an effortless scheduling experience on my end. Gene Johnson made me feel like family. Thank you so much. ❤️

5

Joe did a ton of investigative work and labor to address a pressure, pipe/water tank, and vent installation issue in our home. He is super knowledgeable and walked us through each step, with great tips for general maintenance along the way. Top notch professionalism and quality work!