Trenchless
Trenchless sewer repair in Houston: lining and pipe bursting
Two ways to put a new sewer line in the ground without digging up what sits on top of the old one. Lining works from the inside; bursting pulls a new pipe through the old one. Both are done through pits the size of a doormat, and both have limits we will tell you about.
When trenchless pays for itself
Trenchless costs more per foot than open trench. It wins when the trench would cost more than the pipe — a lateral under a stamped concrete driveway in Cinco Ranch, under a pool deck in Memorial, under a 100-year-old live oak in Braeswood whose roots would be cut by a trench, or across a neighbor's yard on a zero-lot-line street. Trenchless sewer repair Houston homeowners choose is almost always about what is on top, not what is underneath.
It also wins on time. A lining job is one day. A bursting job is one to two. There is no re-pour, no sod, no three weeks of a trench settling.
Cured-in-place pipe lining
A felt or fiberglass tube saturated with epoxy resin is inverted or pulled into the old pipe from a cleanout or a small pit, inflated against the pipe wall, and cured with hot water, steam or UV light. The result is a new, jointless pipe inside the old one, about a quarter inch thick, with no seams for roots to find.
Trenchless pipe lining Houston contractors offer suits:
- Cast iron with channel rot where the pipe is still round enough to hold the liner
- PVC or ABS with minor offsets (under about an inch) and root intrusion at the joints
- Long runs under things you cannot move
It does not suit a collapsed section, a belly (the liner follows the sag), or an offset the tube cannot bridge. Branch connections inside the lined run are reopened afterward with a robotic cutter; on a yard lateral there are usually none, and under a slab there are several.
Pipe bursting
A steel cable is threaded through the old line from one pit to another. A cone-shaped bursting head, pulling a new HDPE pipe behind it, is winched through, splitting the old pipe outward into the soil and leaving the new one in its place. Pipe bursting Houston crews do handles:
- Collapsed or crushed pipe that a liner cannot enter
- Orangeburg, which has no wall left to line against
- Upsizing a 3-inch line to 4-inch
- Long yard runs where the whole pipe is done
It needs two pits — one at the house, one at the property line — and clearance from other utilities, since the burst displaces soil sideways. In tight Houston easements with a water line and a gas line a foot away, we sometimes cannot burst, and we will say so after the locate.
Which one, and when neither
| Line condition | Lining | Bursting | Open trench |
|---|---|---|---|
| Cast iron, channel rot, still round | Yes | Yes | Yes |
| Joints offset under 1 inch, roots | Yes | Yes | Yes |
| Joints offset over 1 inch | No | Yes | Yes |
| Collapsed section | No | Usually | Yes |
| Belly / sag | No | No | Yes |
| Orangeburg | No | Yes | Yes |
| Under driveway, pool, mature tree | Best | Good | Costly |
| Plain grass yard, shallow | Overkill | Overkill | Cheapest |
Under the slab, lining is often the only trenchless option, and it competes with tunneling and with an overhead reroute rather than with a trench. The under-slab page explains that three-way decision.
What it costs
Lining runs about $90–$200 per foot installed in the Houston area, so a 50-foot lateral is $6,000–$12,000. Pipe bursting is $100–$220 per foot with the two pits included, so $7,000–$15,000 on the same run, more if the pits land in concrete. Long runs, deep pits and reinstating branch lines push toward $20,000. The pricing page puts the three methods side by side, and lining vs. pipe bursting goes deeper on the trade-offs. Typical ranges, not a quote.
The honest limits
A liner is only as good as the prep. If the old pipe is not jetted back to bare wall and dried, the resin does not bond and the liner wrinkles or delaminates within a few years. If the camera shows a belly, we will not line it, because a lined belly is still a belly. And any trenchless job in Houston still needs a plumbing permit and a city inspection — a contractor who says trenchless means no permit is telling you something about how they work.
Other sewer services
Sewer Line Repair
One broken, separated or bellied section replaced in PVC after the camera finds it — dig or tunnel to that point only, $1,500–$4,000 typical.
Sewer Line Repair →Sewer Line Replacement
New schedule 40 PVC from the house to the property line, open trench, permitted and inspected — when the whole lateral has failed.
Sewer Line Replacement →Sewer Camera Inspection
A recorded look inside the line with the break located and marked on the surface — the $250–$500 visit that decides whether you need a $500 job or a $12,000 one.
Sewer Camera Inspection →Under-Slab Sewer Repair
Tunneling under the foundation to replace failed cast iron, or re-routing the drains overhead — the Houston job with the widest quote spread, explained.
Under-Slab Sewer Repair →Questions we get asked
How long does a trenchless sewer liner last?
Manufacturers rate cured-in-place liners at 50 years, and lined municipal mains from the 1980s are still in service. The failure cases we see are bad installs — poor cleaning before lining, resin that cured cold, a belly that was lined anyway. Done right on a sound host pipe, it is a permanent repair.
Can you line a sewer pipe under a slab foundation?
Often, yes, and it is one of the three options we weigh against a tunnel and an overhead reroute. Lining works when the cast iron is still round and the joints have not separated far. Branch connections under the slab are cut back open with a robotic cutter afterward. If the pipe has collapsed, the liner cannot enter and we tunnel.
Is trenchless cheaper than digging?
Not per foot. It is cheaper as a total job when the dig would go through a driveway, a pool deck, a retaining wall or a big tree's roots, because you skip the demolition and the rebuild. On an open grass yard with the pipe three feet down, open trench costs less and we will say so.
Does trenchless sewer repair need a permit in Houston?
Yes. It is a replacement of the building sewer under the plumbing code, the same as a trench, and the City of Houston inspects the access pits and the connection. The permit is pulled under our Responsible Master Plumber license and listed on the estimate.
Need sewer line work in Houston?
Call for a free estimate. Mon–Sat 7am–7pm.