How do the two methods differ?
Pipe lining, or cured-in-place pipe, installs a resin-soaked tube inside the old pipe and hardens it into a new, jointless pipe. The old pipe stays in place as a form. Pipe bursting pulls a cone-shaped head through the old pipe, fracturing it outward, while a new continuous pipe follows behind in the same path.
The key difference: lining needs a host pipe that still holds its shape. Bursting does not care, because the old pipe is destroyed.
When does lining fit?
- Cracked, root-filled or leaking joints in pipe that is still round.
- Corroded cast iron with a rough interior but intact walls.
- Laterals with several bends, since flexible liners can follow moderate curves.
- Jobs where the cleanout can serve as the only access point.
Mid-century clay laterals with root intrusion at many joints are classic candidates. See the details on our sewer pipe lining page.
When does bursting fit?
- Collapsed, crushed or flattened pipe that a camera cannot pass.
- Deformed bituminous fiber pipe.
- An undersized line that needs upsizing for added fixtures.
- A reasonably straight run between a launch pit and a receiving pit.
More on the process is on the pipe bursting page.
How do they compare in practice?
| Factor | Lining | Bursting |
|---|---|---|
| Host pipe condition | Must hold its shape | Any condition |
| Access | Often cleanout only | Pits at both ends |
| Pipe size afterward | Slightly smaller | Same or larger |
| Bends | Moderate bends possible | Needs straighter runs |
| Nearby utilities | Little effect | Must be located and cleared |
| Fixes a sag | No | No |
WarningNeither method corrects a belly. If the camera shows standing water along a low section, that part usually needs to be dug and re-laid.
What about land movement?
In and near the Portuguese Bend landslide area, flexibility matters. Bursting with continuous HDPE removes joints that movement can pull apart, which is one reason it is often discussed in neighborhoods like Seaview. Any approach in that area should be checked against the City's current rules. For more on choosing between repairs, see our guide to sewer repair in Rancho Palos Verdes, CA.
What does each job look like on the day?
A typical lining day
The crew arrives with a jetter, a camera and the liner materials. The line is cleaned to bare pipe and filmed. The liner is saturated with resin, inserted through the cleanout or a small pit, inflated against the pipe wall and cured. Connections are reopened from inside and the finished pipe is filmed. Water use is limited until the cure is complete.
A typical bursting day
Utilities are marked in advance. The crew digs a launch pit and a receiving pit, threads a cable through the old pipe and fuses the new pipe into one length. The bursting head is pulled through, the new pipe follows, and both ends are connected. After filming and inspection, the pits are backfilled. Restoration is limited to the pit areas.
Either way, ask for the final video. It is your record of what was installed and the baseline for any warranty claim.
How do the costs compare?
Neither method is automatically cheaper. Lining usually avoids digging beyond the cleanout, which saves on restoration, but it needs thorough cleaning and specialized materials. Bursting needs two pits and pipe fusion, but replaces the pipe outright and can upsize it. On a long lateral under hardscape, the restoration savings of either trenchless method often outweigh their equipment costs compared with digging a trench. The fair comparison is total cost, including cleaning, access pits, connections, permits, restoration and warranty, for the same length of pipe. Ask each contractor to break those items out so you can line the bids up side by side.
It also helps to ask how each contractor handles surprises, such as a section that cannot be lined after cleaning or a bend that stops a bursting head, and how those changes are priced before any extra work proceeds.
Lining vs. bursting FAQs
Which lasts longer, lining or bursting?
Both use materials with long published design lives. Installation quality and the product chosen matter more than the method.
Which is less disruptive?
Lining often needs no pits beyond the cleanout. Bursting needs a pit at each end of the replaced run.
Can one job use both methods?
Yes. A collapsed section can be burst or dug while the rest of the line is lined.
How do I know which my pipe needs?
A recorded camera inspection shows whether the pipe holds its shape, where it has collapsed and how straight the run is.