Slab Leak Detection & Repair

Water leaks can be a headache, but they often have quick, inexpensive fixes. While most leaks are easily spotted, slab leaks develop out of sight and are more challenging. Understanding slab leaks helps you address them promptly and reduce repair costs.

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What is a Slab Leak?

Slab leak repair cost doesn’t have to make you spend sleepless nights. Act quickly to reduce overhaul costs. But first, understand what a slab leak is.

Most modern homes are built on concrete slabs.

A slab leak occurs when a water pipe leaks under a concrete slab foundation. Since the plumbing system lines are beneath the house, you may not even realize that a major plumbing issue is developing.

Slab or foundation leaks can be a serious problem and start off invisible to the eye and can go undetected for weeks or even months. As the problem concerns underground pipes, it’s more difficult to spot.

Consequently, this can lead to several issues affecting concrete foundations that will only get worse if the leak isn’t stopped. Any damage to the slab undermines the structural integrity of the entire house. Therefore, it’s worth knowing the common causes of slab leaks.

Causes of Slab Leaks

Slab leaks happen under several circumstances. Water supply lines run underground and under the slab. When water leaks occur, you have a leak under your home’s foundation that may threaten its concrete foundation.

There are several possible causes of slab leaks.

Old Plumbing Pipes

Slab leaks tend to affect older homes just because having older plumbing lines can lead to all of these causes of slab leaks. Old home’s plumbing system is one of the major causes of slab leaks.

Pipe Corrosion and Abrasion

Corrosion and abrasion stress develop over time, eventually causing leaks. Underground plumbing lines contact soil and metals, leading to galvanic corrosion. Pipes expand and contract with water temperature changes, rubbing against concrete or rocks and causing small abrasions that can lead to leaks.

Improper Installation of Plumbing Pipes

If your pipes were bent, dented, or kinked during construction, these damaged areas become weak. They are prone to pipe bursting when subjected to varying water pressure and the abrasive property of the surrounding ground.

Choice of Pipe Materials

The choice of plumbing materials can be a contributing factor to slab leaks. Cast iron, galvanized steel, and copper pipes are common in older homes, and while these materials are durable, they are also prone to rust and clogging as they age. Newer homes now use plastic pipes such as PVC, CPVC, or PEX that are corrosion-resistant and easy to work with.

Improper Installation of Plumbing Pipes

Choice of Pipe Materials

Poor Water Quality

Having either extremely hard or soft water can cause pipe corrosion. This leads to minor pinhole leaks that, over time, can cause major slab leaks.

Soil Moves

Expansive soil shift is a typical culprit in houses suffering from concrete slab leaks. This swelling and shrinking of the soil happen when the ground conditions change from dry to wet. The movement of the soil under the foundation can potentially damage water pipes.

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Signs of Slab Leaks

Now that you know the common causes, learn how to address slab leaks. First: look for the symptoms that may herald a leak. There are some physical signs to help detect leakage. Let’s review those signs.

Changes in Your Water Bill

Pay close attention to your water bill. If it goes up exponentially one month or steadily over a few months and you aren’t doing anything out of the ordinary, there’s a good possibility that you have a leak.

Unusual Hot or Warm Spots on Your Floor

If you are experiencing unusually hot spots on your floor that you never noticed before, it could be a sign there’s a leak in your hot water line. The hot water has leaked into and under the concrete slab, and now it’s warming the floor.

Sound of Running Water

If you hear water running under your floor when none of your taps or water-using appliances are on, there’s a good chance you have a leak.

Wet Spots

One of the easiest ways to identify a slab leak is by looking for any water spots or damp wet areas that are showing up on your floor. These are usually caused by leaking hot water lines. In addition to being able to visibly see these spots or feel them underneath when walking barefoot, you may be able to hear the sound of rushing water.

Ignoring Slab Leaks Means Property Damage

If you aren’t able to detect a slab leak in time, or you don’t repair slab leaks as soon as you discover it, a slab leak can cause some serious and costly damage to your home.

The following are the issues that can result due to slab leaks:

Ruined flooring – The longer water is allowed to seep in through your home’s slab, the more risk occurs of your flooring being ruined. A slab leak can cause waterlogged carpeting, cracked tiles, and saturated floors.
Damaged foundation – A slab leak causing swelling, and this could result in parts of your foundation to either move or even crack.
Damaged yard – A slab leak can end up rising up through your yard as well. This can result in your yard flooding, which would ruin your grass or landscaping. It can also lead to serious damage to any outdoor pools as well.
Odors and Mold – A slab leak that is left unrepaired will eventually lead to moldy or musty odors spreading throughout your home. Any leaks that originate from your property’s sewer drain lines will lead to the house smelling like sewage. Because drywall tends to soak up water, mold will begin growing rather quickly. Mold is not only unsightly, it can cause health issues to your family, especially for individuals that suffer from respiratory problems.

Repairing a Slab Leak

If you suspect a slab leak, call a specialist immediately. A licensed plumber will use modern equipment to diagnose and pinpoint the leak’s location, offering several repair options.

Trenchless Leak Repairs

This method requires minor demolition and uses pipe liners to seal broken pipes, making it less costly and non-destructive. For badly damaged lines, pipe splitting inserts new, slightly larger pipes.

Re-Route or Re-Piping

For multiple leaks, plumbers may re-pipe or install new pipes, involving demolition if pipes under floors and walls need replacing, which can take several days and may require temporary relocation.

Tunneling

To preserve expensive flooring, tunneling is preferred. The crew digs tunnels under the home, performs repairs, and replaces the removed soil.