How do I know whether I have a slab leak?
Shut off every fixture and appliance that uses water, including the ice maker and any irrigation, and watch the water meter for fifteen minutes. If it is still moving, water is escaping somewhere. Combined with a warm floor patch or an unexplained bill, that points at a line under the slab.
The meter test is free, repeatable and the one thing worth doing before anyone comes out. It will not tell you where the leak is, only that there is one, which is still the most important fact. If the meter is still and the floor is wet, the water is coming from somewhere else, which is useful to know too.
A technician narrows it from there with meters and a thermal camera, and a plumbing contractor pinpoints and tests the line itself. Be wary of anyone who says they can locate a slab leak from a photograph or a phone description: the point of the equipment is that the leak is invisible.
- Close all taps, the washer, the dishwasher, the ice maker and irrigation
- Watch the meter for fifteen minutes; any movement means water is escaping
- Note any warm floor patch and where in the house it is
- Keep a recent water bill to compare against earlier months
- Close the main if you can, until the line has been looked at
Does Oklahoma clay soil make slab leaks worse?
It is a recognised regional condition rather than a measured local rate. The red clays in eastern Oklahoma swell when wet and shrink as they dry, and that movement works on slabs and the rigid lines bedded in them. Oklahoma State University researchers published on building foundations on expansive soils in 2023.
What that means in practice is modest and worth stating carefully. Clay soil can move slabs and lines; it does not follow that every slab leak here is caused by soil, or that a house with a crack has a leak. The honest position is that movement is one of several plausible contributors and that nobody diagnoses it from the surface.
The seasonal pattern is the part homeowners notice. Soil takes up water during the wet spring and gives it up through a dry summer, so the ground around a slab is not doing the same thing in May as in August. If doors start sticking and cracks open in the same season every year, that is a question for a structural engineer rather than for a drying crew.
What has to come up when a slab gets wet?
Carpet and pad almost always, and laminate, engineered flooring and sheet vinyl usually, because they hold moisture against the concrete and swell or delaminate. Tile over a sound bed sometimes stays. Wet baseboard and the lower edge of soft drywall come off so the wall cavity can dry.
The concrete itself stays, of course, and it is the slow part of the job. Concrete releases moisture over days, and a slab that was wet for weeks before anyone noticed will keep reading damp long after the room feels dry. That is a reason to dry it properly rather than a reason to rush it.
Timing the rebuild matters more here than anywhere else. A new sealed floor laid over a slab that was never dried traps the remaining moisture and the floor fails, sometimes a season later. Ask for the final slab readings before the flooring contractor starts, and keep them.
Who repairs the line, and who dries the house?
A plumbing contractor locates and repairs the line, which is licensed work in Oklahoma. Restoration deals with what the water reached: lifting flooring, drying the slab and wall cavities, and logging readings. Oklahoma issues no licence for restoration itself, so judge that work by its written scope and documentation.
The Oklahoma Construction Industries Board licenses plumbing contractors and journeymen, and its rules bar anyone from doing or advertising plumbing work without a licence or registration. Repairs under a slab are exactly the work to check paperwork for, because the access method, whether the line is rerouted overhead or the slab is opened, changes the job and the cost. You can check a licence at cib.ok.gov.
Electrical and mechanical work are licensed by the same board, and roofing contractors register with it. Who can do plumbing and water work in Oklahoma explains which trades the state licenses and how to verify a credential before anyone starts cutting concrete.
What makes one slab leak cost more than another?
How long the water ran, how many rooms the moisture reached, how much flooring has to come up, and how many drying days the slab and cavities need. The plumbing repair is quoted separately and depends on access. The restoration estimate is explained and approved before work starts.
Duration dominates, because a slab leak is often months old before it is found. A leak caught in a week may be one room and a few drying days; one that has been soaking a slab since winter can mean flooring across a whole floor plan, wet plates in several walls and a mold scope on top.
Access is the second factor on the plumbing side: repairing in place means opening the concrete, while rerouting the line avoids that but takes a different path through the house. Those are decisions for you and the plumbing contractor. The Broken Arrow restoration cost guide sets out what moves a restoration quote without quoting a figure.