If you’re living in Frisco and you’ve ever had to deal with a slab leak, you know how frustrating it can be. These kinds of leaks are trouble because they start out small and sneak up on you. The pipes under your concrete foundation carry water throughout your home, so when something goes wrong down there, it’s out of sight and easy to ignore until things start going downhill fast.

I’ve seen it happen more times than I can count. A homeowner notices a small problem, brushes it off, then a few weeks later they’re dealing with soaked floors, mold, and expensive repairs. That’s why I always tell folks it’s important to catch the warning signs early. So if you’re noticing some weird changes in your home, here are five clear signs your slab leak might be getting worse.

1. Increased Water Bills

One of the first red flags I always point out is your water bill. If you haven’t been filling up the pool or running the sprinkler system more than usual, there’s no reason that bill should be climbing month after month. It’s easy to miss at first, but I’ve seen cases where a slow leak under the slab was running practically nonstop, causing the bill to go up gradually over time.

Here’s how to tell if rising costs might be tied to a hidden leak:

– You’re paying more even though your water use hasn’t changed

– You hear the sound of water running when nothing’s turned on

– You’ve already checked for drips and leaks inside the house

If this sounds familiar, it’s time to look into what’s going on below your feet.

2. Damp or Warped Flooring

Another telltale sign is right under your shoes. When water starts to creep up from underneath the slab, your flooring won’t stay dry for long. Hardwood and laminate floors can warp or buckle. Carpeted floors might feel damp or spongy, especially in spots near walls or hallways. Even tile can show signs, like loose grout or shadows of moisture underneath.

One customer in Frisco recently called us because their hallway floor felt off—kind of soft in one area, like the boards weren’t stable anymore. It turned out water had been leaking underneath for weeks, slowly warping the subfloor without any obvious puddles. If you’re starting to notice these kinds of changes, don’t wait. Wet flooring never fixes itself.

3. Persistent Mold And Mildew

Now let’s talk about something that may be more than just annoying—it can affect your health. If mold or mildew keeps showing up in your house and you can’t figure out why, there’s a good chance moisture’s coming from below. Bathrooms and kitchens are usual suspects for mold, but if it’s popping up along baseboards or in rooms that aren’t usually damp, that should raise a red flag.

You might notice a musty smell that hangs around no matter how much you clean. Or maybe you’ve seen dark or green splotches spreading along a wall that faces the outside. Whatever the case, if mold keeps returning no matter how many times you scrub it, it’s probably being fed by a constant moisture source like an active slab leak that hasn’t been repaired.

Mold doesn’t just ruin paint and drywall. It can get into your HVAC system, your furniture, and your breathing space. That’s why I always say if mold keeps showing up, moisture is hiding somewhere nearby, and it needs to be tracked down fast.

4. Decreased Water Pressure

If water pressure around the house suddenly doesn’t feel right, that could be another sign that a slab leak is starting to cause bigger problems. The thing about leak pressure loss is that it doesn’t usually show up right away. It often starts off slow. You may notice it takes longer to fill the sink, or your shower spray feels weaker than usual even when the handle is turned all the way up.

Here’s what I tell people in Frisco to watch out for:

– Showers feel weak or inconsistent

– Faucets in multiple rooms seem slow

– Appliances like washing machines or dishwashers take longer to fill up

When pipes under the slab start leaking, the system loses pressure where water is escaping. If the leak is bad enough, it’ll reduce how smoothly water flows throughout the house. Sometimes it’s easy to blame the city supply, or maybe a clogged aerator, but if you’ve checked the basics and the problem keeps getting worse, it’s time to take a closer look below the foundation.

One homeowner called because their kitchen faucet went from strong to a trickle in just a few days. We looked beneath the surface and found a cracked pipe leaking under the slab, slowly draining pressure from the system. Once that was repaired, the pressure went right back to normal. That’s how quick it can turn around once the leak is resolved.

5. Visible Cracks in Walls and Floors

Cracks might seem like a cosmetic problem, especially in older homes, but when they start forming or getting bigger without another clear reason, the issue might be structural. Water from a slab leak doesn’t just disappear. It soaks into the slab, expands, and puts pressure on everything it touches. That pressure can cause parts of your home to shift into unnatural positions.

Cracks that show up near doorways, along baseboards, or stretching across tile floors are often worth a closer look. You’ll want to notice these things:

– Cracks growing wider or spreading quickly

– Doors and windows that stick or won’t close right

– Uneven or sloping areas in your flooring

These aren’t just surface signs. When the leak causes the foundation to move even slightly, it sets off a chain of issues inside your home. And the longer it goes, the more you risk major damage, like foundation settling or even slab heave. It doesn’t take long for a trickle of water to start reshaping the house around it.

Address the Issue Promptly

Waiting too long to deal with a slab leak is never the right move. Every day that water keeps flowing where it shouldn’t is another day you risk long-term damage to your plumbing and your home’s structure. Costs go up the longer it drags out, especially once you’re dealing with flooring replacement, mold cleanup, or broken walls.

When the warning signs are adding up, don’t ignore them because they seem small or harmless. A boost in your utility bill, some creaking in the floor, or a little mildew in an unexpected spot might not seem urgent on their own, but together they paint a clear picture. Acting quickly gives you a chance to fix the root problem before you’re knee-deep in repairs.

Spot Small Signs Before They Turn Into Big Repairs

It’s easy to underestimate a slab leak when it’s hidden beneath concrete, but the truth is, those small signs you’re seeing could be warning you about bigger trouble coming soon. Whether it’s mold, soft spots in flooring, or sinking water pressure, none of these should be brushed off if you live in Frisco. If you’ve noticed any combination of these issues, it’s time to look into getting it checked before things get worse.

Catching a slab leak early spares you from unnecessary damage and pricey repairs. It also helps protect the parts of your home that matter most—your floors, walls, and the structure beneath everything. Pay attention to the signs. And when things don’t feel right, trust your gut and get ahead of the problem.

If you’re dealing with slab leak issues in Frisco, it’s a good idea to get it checked out before more damage happens. Let Smith and Son Plumbing help you with reliable solutions. Our skilled team is ready to handle slab leak repair in Frisco, ensuring your home remains safe and secure from further damage. To get started or for more information, give us a call at 214-430-7747.