Trenchless

Trenchless Sewer Repair Explained: Lining vs. Pipe Bursting

By Houston Sewer Repair · September 11, 2026 · 5 min read

"Trenchless" is one word for two very different jobs. One puts a new pipe inside your old one. The other destroys your old pipe and drags a new one through the hole. They cost about the same, they both avoid a trench across the driveway, and they suit different kinds of damage. Houston contractors tend to sell whichever one they own the equipment for, so it is worth knowing the difference before someone explains it to you at your kitchen table.

Cured-in-place pipe lining

A flexible tube — felt or fiberglass — is soaked in epoxy resin, fed into the old pipe through a cleanout or a small pit, inflated with air or water so it presses against the pipe wall, and cured hard with hot water, steam or ultraviolet light. When the bladder comes out, the old pipe has a new, jointless, quarter-inch-thick pipe inside it. Roots have no seam to find. Water flows better than it did in the rough old pipe despite the slightly smaller diameter.

Lining works when:

• The old pipe is still round enough to hold the liner against its wall
• Joints have shifted less than about an inch
• The pipe has no belly — a liner follows a sag exactly, and a lined belly is still a belly
• The run can be cleaned back to bare wall by jetting first, which the resin needs in order to bond

Lining fails when the pipe has collapsed (the tube cannot get through), when an offset is too big to bridge, when there is standing water in a sag, or when the prep was skipped. The liner failures we see in Houston are almost all prep failures: a pipe that was jetted quickly and lined wet, and the liner delaminated within five years. Under a slab, lining is often the only trenchless option, and the branch connections to each fixture have to be cut back open with a robotic cutter afterward. Trenchless pipe lining Houston contractors offer for a yard lateral usually has no branches to worry about.

Pipe bursting

A steel cable is pulled through the old pipe between two pits — one at the house, one at the property line. A bursting head shaped like a cone, with a new HDPE pipe fused to its tail, is winched through. The head splits the old pipe outward into the surrounding soil and the new pipe follows in its place. The old pipe stays in the ground in pieces; the new one is a single fused run with no joints.

Bursting works when:

• The old pipe has collapsed or is crushed and a liner cannot enter
• The pipe is Orangeburg, which has no wall left to line against
• You want to upsize, say from a 3-inch to a 4-inch line
• The whole run is bad and the yard is not the problem, the driveway is

Bursting fails when there is another utility within a foot or so — the burst pushes soil sideways and can crush a water line or a gas service — and when the old pipe has a belly, because the new pipe follows the old path. Pipe bursting Houston easements allow is limited by how tightly the utilities are packed; in a 1980s subdivision where water, gas, cable and sewer share a narrow front-yard easement, the Texas811 locate sometimes rules it out.

Side by side

Typical ranges, not a quote.

The Houston-specific part

Trenchless is worth its premium when the trench is what would cost you. A stamped-concrete driveway in Cinco Ranch is $6,000–$10,000 to replace. A pool deck is more. A 70-year-old live oak in Braeswood or Bellaire will not survive a trench through its roots, and it is worth more than the house payment. Those are lining or bursting jobs and the price difference is a bargain.

On a plain front yard with the lateral three feet down in St. Augustine grass — most of Houston — open trench is cheaper and just as permanent, and a trenchless quote is paying for equipment you do not need. We will say so.

The other local wrinkle is the slab. Under a Houston slab, trenchless means lining, and its competitors are a tunnel and an overhead reroute rather than a trench. The under-slab page covers that three-way decision.

Questions worth asking any trenchless contractor

1. Can I see the camera footage you based this on, and where is the footage counter at the problem?
2. Is there a belly? If yes, why are you lining it?
3. What was the pipe cleaned with before lining, and will you camera it after cleaning and before the liner goes in?
4. How are branch lines being reinstated?
5. What are the pits going through, and who restores that?
6. What is the permit number? Trenchless work is a replacement under the plumbing code and the City of Houston inspects it. A contractor who says trenchless needs no permit is not one who should be under your slab.

The trenchless sewer repair page has more on both methods, and the pricing page puts them next to open trench for the same run.