Trenchless repair handles root intrusion and corrosion well — those are among the best applications for it. What it cannot fix is a pipe that has lost its shape or its grade, which is why the camera inspection comes first.

How Trenchless Repair Works

Two methods cover most residential work.

Pipe lining, sometimes called cured-in-place pipe, pulls a resin-saturated liner through the existing pipe and cures it in place. The result is effectively a new pipe formed inside the old one, seamless and jointless.

Pipe bursting pulls a bursting head through the old pipe, fracturing it outward while simultaneously drawing new pipe in behind. This one actually replaces the pipe and can upsize it.

Both require access pits at each end rather than a trench along the entire run — which in Hill Country soil, where excavation hits limestone and costs climb accordingly, is a substantial difference.

Root Intrusion

Roots are one of the clearest cases for trenchless repair.

They enter through cracks and separated joints — clay laterals with mortared joints are particularly vulnerable, and they are common in older Fredericksburg and Kerrville properties. Live oak and pecan roots are aggressive and find those joints reliably.

Lining seals the pipe from the inside with a jointless surface. There are no joints left for roots to enter through, which addresses the cause rather than the symptom.

Compare that to repeated cabling or hydrojetting, which clears roots effectively but leaves the entry point intact. Those are maintenance; lining is a repair.

Corrosion and Scale

Cast iron laterals — standard in mid-century construction and common in older Hill Country homes — corrode from the inside out. The interior scales and flakes, progressively narrowing the pipe and creating rough surfaces that catch debris.

Lining works well here, provided the pipe still has enough structural integrity to host the liner. It restores a smooth interior and stops further deterioration.

Where corrosion has gone further and the pipe is failing structurally, bursting replaces it entirely.

Where Trenchless Does Not Work

This is where honest assessment saves you money and disappointment.

Bellies. A section that has sagged so water stands in it is a grade problem. Lining a bellied pipe gives you a lined pipe that still holds water and still clogs chronically. The only real fix is excavating and re-grading that section.

Severe collapse. Lining needs a host pipe to line. Where a section has collapsed entirely, there is nothing to work with — though bursting can sometimes still work depending on the extent.

Severe offsets. Joints that have shifted badly may not allow equipment to pass.

Access constraints. Both methods need entry and exit points, and some property configurations do not allow them.

Why the Camera Comes First

Everything above is invisible from the fixture. Root intrusion, corrosion, a belly, an offset, and a collapse all present the same way — a line that will not stay clear.

A sewer camera inspection distinguishes them, and it locates the problem precisely so a repair can be targeted rather than exploratory. You see the footage yourself.

We will not quote a trenchless repair on a line we have not looked at, because the failure mode — lining a pipe that needed replacing — is expensive and entirely avoidable.

What Ends Up Being Recommended

Depending on what the camera shows, the answer might be routine drain cleaning, jetting, a targeted repair, trenchless rehabilitation, or full sewer replacement.

Sometimes it is monitoring — minor root intrusion that is worth watching rather than repairing today.

Financing is available for larger sewer projects. Details are on our main sewer line repair page.

Contact 72 Degrees or call (830) 468-5316.