slab Leak Detection & Repair

A slab leak occurs when a water supply or drain line running beneath your concrete foundation develops a crack or hole and begins leaking. In older commercial buildings, this is often caused by corrosion in copper or galvanized pipes, shifting soil or settling foundations, high water pressure, or abrasion from pipes rubbing against gravel or concrete. Left undetected, slab leaks can cause serious structural damage, mold growth, and dramatically elevated water bills.

Common signs include: unexplained increases in your water bill, the sound of running water when all fixtures are off, warm or damp spots on the floor, cracks appearing in walls or flooring, low water pressure throughout the building, or a musty/mildew odor coming from the lower floor or basement. If you notice any of these at your Hood River or Gorge-area commercial property, contact Chinook Plumbing at (541) 386-3388 immediately.

Chinook Plumbing uses non-invasive detection methods including electronic leak detection equipment and pressure testing to locate the precise point of the leak beneath your slab — before any concrete is cut. This minimizes disruption to your business and reduces the cost of the repair by targeting only the affected area rather than opening up large sections of flooring.

Once the leak is located, our plumbers make a targeted opening in the concrete slab directly above the damaged pipe, repair or replace the affected section, and then restore the slab to its original condition. For extensive corrosion or multiple leaks, we may recommend repiping or rerouting the line above the slab to avoid future issues. We’ll give you a clear explanation of all options before any work begins.

Slab leak repair costs vary depending on the location of the leak, the depth of the pipe, and the extent of the damage. Detection alone typically ranges from $300–$600. Full repair including concrete work can range from $1,500 to $4,000 or more for complex situations. Chinook Plumbing provides free estimates — call (541) 386-3388 to schedule an assessment.

Yes — this is one of the most serious consequences of an undetected slab leak. Moisture seeping up through the slab creates ideal conditions for mold and mildew growth inside walls, under flooring, and in crawl spaces. Beyond the health hazard, mold remediation adds significant cost on top of the plumbing repair. The sooner a slab leak is detected and repaired, the lower the overall damage.

Yes. Although this page is focused on commercial slab leak repair, Chinook Plumbing handles slab leak detection and repair for residential properties throughout Hood River, The Dalles, White Salmon, and the Columbia River Gorge as well. Call (541) 386-3388 to discuss your situation.