Slab leaks are one of those hidden problems that can escalate quickly if left unaddressed. Because the pipes run under the concrete foundation, even a small pinhole can release a steady stream of water that you cannot see. We help you identify the early signs, confirm the source, and resolve the issue using methods that protect your structure and budget.
What Causes Slab Leaks
Most cases come down to age, water chemistry, and movement. Copper lines can pit over time, and soil shifts can rub pipes against rough aggregate. High water pressure speeds wear and raises the chance of failure at joints. In new builds, poor bedding or sharp bends can also lead to future trouble. The result is the same. Water escapes, wicks into the slab, and seeks the path of least resistance.
Warning Signs You Can Trust
Look for warm spots on the floor, the sound of water when fixtures are off, rising water bills, or hairline cracks that seem to grow. Damp carpet or musty odors near interior walls can also point to a leak under the slab. We use acoustic listening, pressure tests, and thermal imaging to narrow the target zone without tearing up your floors.
Why Fast Action Matters
Water under a slab can weaken soils, lift flooring, stain baseboards, and encourage mold growth. Left alone, it may undermine sections of the foundation and cause doors to stick or tile to pop. Quick diagnosis and a clean repair cut off the source and stop secondary damage before it spreads into walls and finishes.
How We Locate And Repair
Our plumbing team follows a step-by-step plan. First, we isolate the affected line and map the route. Then we choose the best fix for the property. Spot access allows us to open a small section and patch the line when the rest of the piping is in good condition. Rerouting above the slab avoids future slab work and is a smart approach when multiple hot spots are identified. For larger systems with aging pipe, repiping selected runs gives long-term peace of mind.
Contact Green Planet Plumbing at (206) 745-4510 to enlist our help when you suspect slab leaks may be present under your Seattle property.