Slab leak repairs in Denver

Two problems, one name

Slab leak repairs divide in two before any work starts. A slab leak is any leak from a pipe running under or through a concrete floor slab, and that definition hides the distinction that decides everything afterward. On one side are the pressurized lines: hot and cold water supply, usually copper, sometimes older plastic, carrying water under constant pressure whether anyone is using it or not. On the other side are the drain lines: the waste pipes running under the slab to the sewer, usually cast iron in older houses and plastic in newer ones, carrying water only when something upstairs drains.

A supply leak runs continuously and pushes water into the ground under the house at pressure. A drain leak releases waste intermittently and by gravity. The symptoms overlap enough that homeowners describe both the same way, and the repair paths have almost nothing in common.

Telling them apart before anyone breaks concrete

A few observations separate them quickly. A warm patch on the floor, a hot water heater that runs more than it used to, the sound of running water with every fixture closed, and a water meter that creeps with the house shut off all point at a pressurized supply line. Sewer odor, drains that gurgle or back up, moisture that appears after heavy fixture use rather than continuously, and cracking that follows the drain route rather than the supply route all point at the drain side. A pressure test on the supply system and a camera in the drain line settle it, and both should happen before a jackhammer appears.

How a drain-side leak under the slab is located

The camera goes in through an existing cleanout and runs the under-slab system while an operator tracks the head from above with a locator. Where the video shows a break, a separated joint, a hole in the bottom of a corroded cast iron line or roots entering, the sonde is parked and the position is marked on the floor with a depth. That mark is what any later decision is built on. Where the picture is ambiguous, a static test that fills the drain system and watches the level fall confirms whether the line is losing water at all, and smoke or dye can confirm a suspected path.

Repairing the drain side without opening the floor

Once the defect is located and the pipe has been cleaned, a drain-side leak under a slab is usually repairable from the cleanout. For a single break or separated joint, trenchless drain repair under a slab in Denver places a short resin-saturated sleeve across the defect and cures it there, and the floor never opens. For a line that is corroded along its length rather than failed at one point, a full liner runs from the cleanout to the point where the pipe leaves the foundation. Either way the work happens through openings the house already has, which is the whole reason the method exists.

The cases that do require breaking concrete

• The pipe has collapsed. A liner needs a continuous host to cure against, and a section that has fallen in gives it nothing.
• The line has a belly under the slab. Lining preserves grade, so a section that ponds water goes on ponding it.
• Access does not exist. Some houses have no usable cleanout on the under-slab system, and one has to be created before anything else happens.
• The leak has undermined the slab. Where water has washed soil out from beneath the concrete, the void is a structural matter that gets addressed whether or not the pipe is lined.

The damage around the pipe, not just in it

A leak under a slab has been doing something to the ground for as long as it has been running. On expansive soils, added moisture swells the clay and lifts part of the floor. On sandy soils, moving water carries fines away and leaves a void that lets the slab settle. Fixing the pipe stops the cause but does not reverse either effect, so the sequence that makes sense is to repair the leak, let the moisture normalize, and then assess the floor. Understanding how a sectional liner repairs a single defect helps an owner read what the camera found, and verified trenchless installers serving Denver will show the located mark and the depth before proposing any method at all.

What a good proposal looks like

It names which system leaks, supply or drain, and says how that was established. It gives the location and depth of the defect rather than a general area. It states the method proposed and what it does not cover, particularly floor restoration and any structural work. And for a drain-side repair it commits to a post-repair camera run proving the defect is gone, because a leak under concrete is not something anyone gets to inspect by eye afterward.

Common questions in Denver