Homeowners often arrive at this decision assuming it is a choice, like picking a countertop. It is not. Both methods avoid a trench, which is why they get grouped together, but they address different mechanical failures — and the pipe decides which one applies.
Here is the distinction in one sentence: lining rebuilds a pipe that is still standing, bursting replaces one that is not.
Side by side
| CIPP lining | Pipe bursting | |
|---|---|---|
| What it does | Cures a new pipe inside the old one | Destroys the old pipe, pulls in a new one |
| Host pipe needed | Yes — must be structurally present | No |
| Access points | Usually one | Two (entry and exit pits) |
| Effect on diameter | Slight reduction, smoother wall | Same or larger |
| Fixes a belly? | No — preserves the sag | Yes, when regraded |
| Excavation | Often none | Two compact pits |
| Typical duration | One day | One day |
| Result | Jointless liner inside old pipe | New jointless HDPE line |
When lining is right
Lining is the answer when the pipe is damaged but has kept its shape. Cracks, root intrusion at joints, corroded-but-intact cast iron, minor offsets — these are all conditions where there is still a pipe to cure against.
This describes the majority of failing laterals in older Montgomery and Prince George’s County neighbourhoods. Clay pipe under Chevy Chase and Takoma Park usually fails at the joints while the barrel sections remain sound. That is a lining job.
When bursting is right
Bursting is the answer when there is not enough pipe left to work with, or when the pipe that is there is the wrong size.
A collapsed section, a line crushed by ground movement, cast iron that has corroded through along the bottom, or a lateral that is simply undersized for a home that has gained bathrooms — none of those are fixable by lining, and all of them are ordinary bursting jobs.
The belly problem
This deserves its own section because it is the single most common reason a lining job goes wrong.
A belly is a low section where the pipe has sagged and now holds standing water. Waste slows there, solids settle, and the line clogs on a cycle no amount of cleaning ends.
A liner cures inside the shape it finds. Line a bellied pipe and you get a smooth, watertight, perfectly sealed sag — the leak is fixed and the actual problem is untouched. The line will keep clogging, and now it has a liner in it.
What about cost?
Bursting generally carries a higher per-foot rate than lining, because it involves excavation, new pipe material and heavier equipment. But comparing the two on price is usually the wrong exercise — in most cases only one of them is technically appropriate for your pipe.
Where both genuinely are viable, we quote both and explain the trade-off. Where only one is, we say so and explain why.
How the decision actually gets made
- Camera the full lateral, cleanout to main, and record it.
- Assess structural condition: is there a sound host pipe along the whole run?
- Check for bellies with standing water — this alone can rule lining out.
- Check diameter against the home’s current fixture count.
- Match method to findings, and show you the footage the decision was based on.
That is the whole process, and it is why we will not quote either method over the phone. Anyone who does is guessing about your pipe.