Slab Leak Detection & Repair

Trusted, Local Experts in Concrete Slab Leak Detection & Repairs

The Importance of Early Concrete Slab Leak Detection

Most homes are built on a solid slab of concrete. A slab leak refers to a leak that forms in the plumbing underneath your home’s concrete foundation. It is possible for this leak to occur through water or sewer lines. Even small slab leaks can cause severe and costly damage if not detected early as the problem worsens over time. Potential damage ranges from mold or mildew growth to substantial structural damage.

Common Signs of a Slab Leak

Detecting, finding, and repairing a slab leak is uniquely challenging because it is under a slab of concrete. Your best chance at catching a slab leak early and limiting the amount of damage it can cause is knowing how to recognize the warning signs. Below are some of the most common signs that indicate you may have a leak in your slab foundation.

  • Hearing the sound of running water even when it is turned off
  • Water spots, hot spots, damp areas, or cracks appear on your floor
  • Sections of your floor appear swollen
  • Mildew or moisture building up beneath the carpeting
  • A dramatic increase in your water bills over a short period of time
  • Unusually low water pressure

Professional Slab Leak Detection Services

At the first sign of a slab leak, it is essential to call a qualified plumbing professional like McLay Services. A qualified expert will have the correct tools and knowledge to pinpoint the spot of the leak and recommend the best way to solve the problem.

Professional Concrete Slab Leak Detection Services Upland

At McLay, we often use electronic amplification equipment to uncover the exact location of a slab leak without causing extensive disruption to property.

Options for Fixing Foundation Slab Leaks

The most common approaches to fixing a slab leak include:

  • Spot Repair – Spot repair is usually best for newer construction. This method involves opening the slab and repairing the issue at the point of the leak.
  • Pipe Re-routing or Re-piping – When a home or building has older plumbing with a history of leaks, it is often best to reroute or replace the entire line.

If you suspect a slab leak and live in the area in and around La Verne, San Dimas, Glendora, Rancho, Cucamonga, Claremont, Upland, Chino, Diamond Bar, Walnut, Ontario, Azusa, Ontario, Pomona, and Fontana, contact McLay Services at (909) 392-2202 to schedule a slab leak detection appointment. We will send out one of our qualified technicians to pinpoint the source of your leak and recommend the best way to solve the problem.

Call McLay Services Today. We’re the Experts in Slab Leak Detection & Repairs, Including Spot Repairs, Partial Repipes, Whole-Home Repipes & Pipe Reroutes

McLay Services, Inc. is a licensed, family-owned plumbing company that has served the local community since 1978. We strive for total customer satisfaction and will do everything possible to get the job done quickly and efficiently. Because of our commitment to quality work and excellent service, we have won numerous awards and have more than 416 five-star reviews on Google and Yelp.

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Customer Reviews

Google Reviews

McLay Services, Inc.

5 Star Ratings on Google
4.8 Stars - Based on 69 Reviews
Yelp Testimonials

McLay Services, Inc.

4/5 Star Ratings on Yelp
4.5 Stars - Based on 116 Reviews
Angi’s Reviews

McLay Services, Inc.

4/5 Star Ratings on Angi
4.8 Stars - Based on 265 Reviews

Customer Reviews


I have used McLay on several occasions, including slab leaks, and find them to be outstanding. They provide prompt courteous and professional service and are reasonably priced. I highly recommend them.

K A., San Clemente, CA Via Yelp Testimonial


Great service and arrived on time. Had a plumbing issue at my office and it was resolved the same day. Thanks for the great service.

Chris Dilley Via Google Review