Santa Fe Slab Leak Detection

What is a slab leak?

A slab leak, also called a foundation leak or concrete slab leak, is a water leak in the pipes under the concrete foundation of your home or business. This type of leak can cause significant damage to a building’s structure and lead to the development of mold. It’s important that foundation leaks are repaired as soon as possible by a licensed professional to prevent further damage.

What Causes Slab Leaks?

Foundation movement

If the foundation shifts, the pipes can move as well, which could cause them to pull apart, crack, or break. Foundation movement can be due to Santa Fe’s unique soil expanding and contracting with the changing weather or poor-quality foundation repairs.

Corroded copper or cast iron pipes

Over time, water and chemicals in and around pipes can cause them to break down or rust. Common causes include the use of water softeners and cleaning solutions. Corrosion can also happen when the water velocity in the pipes is too high, if pipes are sitting in wet soil, and where copper pipes come into contact with the steel rebar in the concrete foundation.

Pipes that are broken or cracked by tree roots

Poor installation of sewer lines or incoming water lines

What are the Symptoms or Problems of a Slab Leak?

Because slab leaks happen below the foundation of your home or business, you may not notice signs of a leak until water has built up and already caused damage. If you notice any of these things, you may have an under slab leak.

Water bill is unusually high

Unfortunately, this is usually how many home or business owners discover they have a leak in their water supply line. Even a small “pinhole” leak can waste over 10,000 gallons of water in just a month.

Excess water around the foundation

Unfortunately, a sewer line can leak under the foundation for years before being noticed. With the expansive soils in New Mexico, a sewer leak could cause the soil to swell. You may notice wet flower beds or soggy dirt around the building’s foundation. Over time, all that water can cause the slab to erode.

Structural damage to the building

If enough water is present, New Mexico’s expansive soil can swell up enough to actually lift a building. When this lifting, or heaving, is due to a water leak, you’ll see the foundation buckle. Cracks in floors or walls, floors that are uneven, or doors dragging on the floor are all signs that there could be a water leak under your building’s concrete slab.

Sound of running water

If you can hear water running through the pipes when there isn’t any water being used, that’s a good sign that there could be a leak.

Damp or warm spots on floor

When there’s a leak under the slab, water can seep up through the concrete and onto your flooring. Wet floors, carpet, or baseboards are all possible signs of a leak. Mildew under your flooring is another indicator. If areas of the floor feel warm or even hot, you could have a hot water line leaking out under your foundation.

Remember, these problems will only get worse with time, so it’s important to call the professionals at James’ Plumbing & Heating as soon as you suspect a slab leak. We’ll find and fix the leak, so you can be sure your home or business is a stable, safe, healthy place to be.

Slab Leak Detection

Before a leak can be fixed, we have to confirm that there is a leak, and find exactly where it’s located. James’ Plumbing & Heating starts investigating a slab leak by visually inspecting your property for the signs listed above. Based on this evidence, we can usually determine whether the source of the leak is more likely to be a sewer pipe or water supply line. Then we can begin the actual testing.

Detecting leaks from a sewer line

To check for sewer line leaks, hydrostatic testing is used. A special ball is placed in the main sewer line and inflated until it’s big enough to plug the line. Then we attempt to fill the entire system with water. After 20 minutes, if the lines can’t be filled or they’ve lost water, there’s a slab leak. Once we’ve confirmed a sewer line leak, we have to figure out where it is. We use a special camera to go into the sewer lines and inspect them visually. We can also perform a leak isolation test, which involves filling different sections of pipe with water to see if it will hold.

Detecting water supply line leaks

A pressure test checks for leaks by checking the water pressure delivered from the main supply at the street and comparing it to the pressure in the lines after the supply from the street is turned off. If the pressure in your home’s water lines drops, there’s a leak somewhere.

After a water supply line leak is confirmed, the location is determined by first checking faucets and toilets for drips and leaks. If there are none found, acoustical listening devices can be used to detect the sound of leaking water under the building.

James Plumbing also recommends slab leak detection in these situations:

  • Before any foundation work is started
  • After foundation repair has been completed
  • Before you buy a home
  • Once a year in areas where foundation cracks are common

Once we’ve discovered where the leak under your slab is located, we can fix it.

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Local Reviews

Rated 5.0 out of 5 stars based on 35 customer reviews

Map of Santa Fe, NM

Fast. Efficient. Affordable




Called for a broken furnace. Squeezed us into their schedule and arrived quickly. Friendly service. Found the faulty part, replaced it and made recommendations to replace another part before it failed. Definitely recommend.


Map of Santa Fe, NM

Knowledgeable , friendly and fairly priced.




One stop plumbing / heating / cooling.


Map of Santa Fe, NM

Professional, efficient, knowledgeable EXPERT




Great service


Map of Santa Fe, NM

Great Company




Friendly, knowledgeable, great service! I highly recommend them!


Map of Santa Fe, NM

Brilliant!




First rank! Smart, helpful, above and beyond...


Map of Santa Fe, NM

James is great! Knowledgeable,responsive, reasonable




Came quickly when water heater conked out. Installed tankless unit. Back today to convert two fireplaces to natural gas very happy with results and will have him back in a few weeks during master bath update.


Map of Santa Fe, NM

Best in Santa Fe 5 star service




Great company they are honest, fast and very reliable.


Map of Santa Fe, NM

Great service after hours!




James came out promptly Wednesday evening after I came home from a trip and discovered I had no hot water. Very much appreciated!


Map of Santa Fe, NM

Great Service




Very easy.


Map of Santa Fe, NM

A good plumber.




It seems hard to find a trustworthy, dependable and reasonably priced plumber in Santa Fe, but James Martinez and his company fit that bill. I had one plumbing crisis as winter began, to replace an aqua stat on my boiler, which James did within 24 hrs of me getting the part (and it didn't bother him that I purchased my own part). The second job was to repair some copper corrosion which he did cleanly and quickly. He had to come back the next day to bleed out more air from my boiler because I couldn't wait for it to sound normal again on its own. He was patient and incl his second visit as part of his first trip. He is very fair with his pricing. I've had other plumbers really take advantage of my plumbing situations. James doesn't. No plumber shows up right when they say they will, but James tries his best to do so. He likes to communicate via text. I appreciate his quick responses. I will hire James again because he cares and wants to make sure I'm "happy".


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