7.5 gal/hr
Sets off a Leak Alert
Warm Spots, Wet Flooring, a Running Meter
What a Slab Leak Does to Your Floors
A slab leak is a break in a water line under your home’s concrete floor. The water has nowhere to go but up, into carpet, pad, hardwood and the bottom of the walls, often for weeks before anyone sees it. Call now to get a restoration crew out to find how far it spread, dry the floor and quote the work before it starts.
A plumber finds and fixes the line, either through the slab or by rerouting it above. The water already in the floor is a separate job. Flooring over the leak usually has to come up so the concrete can dry, and then the floor goes back.
Know When to Call
Signs of a Slab Leak
Slab leaks show up slowly, through the floor and the water bill. Watch for these, especially more than one at once.
- A warm spot on the floor, often from a hot water line
- Damp carpet or a musty smell with no visible source
- Hardwood or laminate that cups, buckles or lifts
- The sound of running water with every faucet off
- A water bill that jumps with no change in use
While You Wait for the Crew
- 1Turn off every faucet and appliance, then check whether the meter keeps moving.
- 2If it does, shut off the main valve where the supply line enters the house.
- 3Turn off the water heater if the warm spot points to a hot water line.
- 4Photograph the wet flooring, the meter and your last few water bills.
- 5Move furniture and rugs off the damp area so the floor can be reached.
How It Works
Slab Leak Water Damage Cleanup, Step by Step
Here’s how the floor goes from wet to ready for new flooring, working alongside the plumber’s repair.
Map the Wet Area
Moisture meters show how far water spread under carpet, tile and hardwood, which is usually wider than the warm spot.
Fix the Line
The plumber reaches the line through the slab or reroutes it overhead. Drying starts once the line is shut off or fixed.
Lift the Flooring
Carpet, pad and any swollen hardwood or laminate over the wet area come up so the concrete beneath can dry.
Dry the Slab
Dehumidifiers and air movers run until readings show the concrete and wall bottoms are dry enough for new flooring.
Typical Costs
What Slab Leak Repair Costs
A slab leak means two jobs, the plumbing repair and the water damage it caused. These are national ranges, and your price comes after an inspection.
$100–$400
To locate the leak under the slab
$1,000–$4,000
To repair the line through the slab
$4,000–$15,000
To reroute the line above the slab
$3.75–$4.25
Per sq ft to dry the wet flooring
What Changes the Price
- How the Line Is FixedOpening the slab for one spot repair costs the least. Rerouting or repiping lines through walls and attic costs more.
- How Long It LeakedA leak caught early wets one room. One left for weeks can reach several rooms and the bottom of every nearby wall.
- What Flooring Is on TopCarpet and pad come up quickly. Tile, hardwood and laminate glued or nailed over the slab take more removal.
- What Has to Be ReplacedFlooring that swelled or came apart has to be replaced, which can cost more than the drying itself.
National figures from Fixr (2025). Your plumber and contractor price your home after an inspection.
Local Factors
Why Slab Leaks Show up in Temecula Homes
How local homes were built, and when, both make a slab leak worth checking for.
Built on Concrete Slabs
Geotechnical filings for local subdivisions describe wood-frame homes on concrete slabs on grade. The water lines run under or through that slab.
Lines That Are Decades Old
About a third of Temecula’s homes were built in the 1990s and 43% of Murrieta’s in the 2000s (Census ACS). The lines under those slabs have been in place ever since.
Watch for a Leak Alert
Rancho Water alerts customers when the meter records at least 7.5 gallons an hour, every hour, for three days. That steady flow is a common sign of a hidden leak.
Questions
Slab Leak Water Damage Questions, Answered
Common signs are a warm spot on the floor, damp carpet with no visible source, flooring that cups or lifts, the sound of running water with every fixture off and a jump in the water bill. A plumber’s leak detection confirms it.
Nationally, finding a slab leak runs about $100–$400 and repairing it about $1,000–$4,000, while rerouting the line can reach $4,000–$15,000 (Fixr, 2025). Drying and replacing the flooring over the leak is a separate cost.
It depends on the policy. Sudden water damage is commonly covered, but many policies exclude continuous or repeated seepage, which is how a slab leak often behaves. Ask your insurer what yours covers before work starts.
The water keeps soaking the flooring and the bottom of the walls, and the EPA warns mold can start if wet areas aren’t dried within 24 to 48 hours. A leak left for weeks can also be harder to claim, since many policies exclude long-term seepage.
Often, yes. Murrieta, for example, treats replacing a concealed pipe as new work that needs a permit, and asks for the application within one business day of an emergency repair. Your plumber files it with the city.
Usually only the flooring over the wet area. Moisture readings show where the water went, and the carpet, pad or boards there come up so the slab can dry. Dry flooring beyond it can usually stay.