If you’ve already paid to have roots cut out of your sewer line (or you’ve dealt with repeat clogs every rainy season), you’re probably asking the real question: “Are we just trimming the problem… or can we actually stop it?”
Tree roots don’t “randomly” break into pipes. They do what roots are designed to do: hunt for water, oxygen, and nutrients. Your sewer line can provide all three, especially if you have older pipe materials or imperfect joints. The frustrating part is that root cutting alone often feels like it works… until it doesn’t.
The good news is that in many cases, relining (CIPP) really can stop recurring root intrusion long-term—because it removes the reason roots keep getting back in: openings like joints, cracks, gaps, and deteriorated sections. Done correctly, a full-length liner creates a continuous, jointless interior barrier that blocks reentry.
Below is a homeowner-friendly, no-hype breakdown of when relining is a true solution, when it isn’t, and how to make sure you’re actually fixing the cause (not just winning a temporary battle).
Why roots keep coming back (even after cutting)
Most sewer root problems are not about “a root in the pipe.” They’re about “a pipe that has access points.”
Roots typically enter through:
Aging or separated joints (common in clay tile and older pipe systems).
Hairline cracks.
Offsets (where one pipe section shifts slightly).
Deteriorated materials like old clay, cast iron, or Orangeburg.
Partial collapses that create voids and leaks.
Once a tiny root hair finds moisture leaking at a joint or crack, it follows that moisture gradient. Over time, those hair roots thicken and branch, catching toilet paper and waste, causing slow drains and backups.
Even if you cut roots out perfectly today, the entry point is still there tomorrow. That’s why mechanical removal is often described as maintenance, not a permanent fix. Industry guidance commonly positions root cutting/jetting as clearing the obstruction, while structural repairs like lining address the opening that allowed intrusion in the first place. For example, Oatey’s overview explains that after mechanical root removal, cured-in-place pipe lining can seal openings and help prevent future intrusion by creating a new pipe inside the old one (Oatey). Other plumbing resources similarly note that mechanical augers clear roots but don’t prevent regrowth unless you address the pipe defects (Sewer Heroes).
What relining is (and why it’s different than “just clearing”)
CIPP pipe lining (cured-in-place pipe) is a trenchless method where a resin-saturated liner is installed inside your existing pipe and cured into a hard, smooth, jointless pipe within a pipe.
What that means in plain terms:
The liner seals joints and cracks from the inside.
Roots can’t “grab” a seam, because the liner is continuous.
It stops the moisture leak that attracted roots in the first place.
It also reinforces the pipe wall (helpful if the original pipe is aging but not fully collapsed).
This is why lining is often recommended as the long-term prevention step after roots are removed. The “remove first, then seal” approach is a common best practice—cut/jet to restore diameter and flow, then line to prevent reentry (Oatey).
So… will relining actually stop roots?
In many recurring-root scenarios: yes, relining can stop roots from coming back into the lined section because it eliminates the entry points.
But the real answer depends on 4 factors.
1) Is the liner full-length (or are there unlined joints left behind)?
Roots don’t care how much you lined—only whether there’s still a place to get in.
If you line only a short section but leave compromised joints upstream or downstream, roots can still intrude there, and you’ll still get problems. The most “maintenance-light” outcomes typically come from full-length lining of the problem run (for example, house to city connection where appropriate), or at least lining every defect zone identified on camera.
2) Is your pipe a good candidate (not collapsed, not severely deformed)?
Relining is excellent for pipes that are:
Cracked.
Root intruded.
Slightly offset.
Leaking at joints.
Structurally present but failing.
Relining is usually not the right solution when:
The pipe has a major belly/sag holding standing water (liners don’t remove the low spot; they conform).
The pipe is collapsed or missing sections.
The line is severely backpitched or misgraded.
There’s extreme deformation (the liner needs a passable pathway).
A camera inspection is what separates “great lining candidate” from “needs replacement or pipe bursting.” If you’re in the San Jose / Santa Clara County area, Drain and Water specializes in sewer camera inspection so you’re not guessing before you commit to a repair strategy.
3) Is the prep work done correctly (roots removed thoroughly first)?
A liner needs a clean, properly prepared interior surface to bond and cure correctly. If roots are left behind, you can end up with:
Reduced diameter.
Poor liner seating.
Premature issues at the edges.
That’s why the most reliable approach is:
Cut roots mechanically or hydro jet.
Confirm cleanliness and defects with camera.
Install a liner that spans the vulnerable areas (ideally full-length).
Re-camera to verify cure and reinstated connections.
This sequencing matches how many professional guides describe the process: mechanical clearing first, lining as the repair/prevention layer (Oatey).
4) Are there other openings outside the lined section (cleanouts, transitions, connection points)?
Even with perfect lining, you still have system “edges”:
Transitions to other pipe materials.
Connection points near the city main.
Branch line connections (laterals).
A properly installed liner typically includes reinstating those connections, but you still want a post-lining camera verification. If a contractor can’t clearly explain how transitions and reinstatements are handled, that’s a red flag.
Root cutting vs. relining vs. replacement: which one is “right”?
Root cutting (snake/root cutter):
Best for immediate relief and restoring flow.
Usually recurring maintenance if the pipe has defects.
Good as a first step and as prep for lining.
Hydro jetting:
Excellent for flushing debris and cleaning the pipe walls.
Not always safe for fragile, failing pipe.
Still doesn’t “seal” entry points on its own.
Relining (CIPP):
Best for stopping reentry by sealing cracks/joints.
Trenchless, minimal disruption.
Can add years/decades of life when pipe is structurally present.
Replacement / pipe bursting:
Best when the pipe is collapsed, severely bellied, or beyond rehabilitation.
More invasive than lining (though pipe bursting is trenchless in many cases).
Often the only real option in severe structural failure.
A practical way to decide is: if the camera shows the pipe is still there but leaking/offset/cracked with roots at joints, lining is often the “fix it right” move. If the camera shows collapse or major grade failure, replacement is the more honest answer.
Pro tips (to make relining a true long-term solution)
Pro tip: Don’t buy a liner without a recorded camera inspection.
Ask for the video. You want to see the exact defects, distances, and whether there’s a belly or collapse. A written summary is helpful, but video removes ambiguity.
Pro tip: Make sure the lining plan matches the root pattern.
If roots appear at multiple joints לאורך the line, a spot repair might not end the cycle. A full-length liner is often what turns a recurring intrusion into “maintenance-light.”
Pro tip: Confirm what warranty applies and what it covers.
Drain and Water offers industry-leading warranties, including limited lifetime warranties available (per company profile). Ask what’s covered: liner integrity, workmanship, reinstatements, etc.
Pro tip: If you have large trees, avoid “chemical-only” strategies as your primary plan.
Some sources discuss chemical root killers as preventive maintenance, but they’re not structural repairs. They don’t fix cracks/joints and typically require reapplication (Oatey). Use them only if a professional recommends them for your situation.
Pro tip: After lining, protect the system with smarter usage.
Even a lined pipe can clog from grease, wipes, and heavy buildup. A liner is a root barrier, not a permission slip to abuse the drain. If you’ve had backups, consider periodic maintenance checks (especially in older Bay Area homes with mature landscaping).
What to expect from a root-stopping relining project (step-by-step)
At Drain and Water Plumbing Services, trenchless projects are designed to minimize disruption and protect landscaping using no-dig methods (including their TrenchFree™ technology partnership, per the company profile). A typical “roots keep coming back” plan looks like this:
Camera inspection to locate intrusion points, offsets, cracks, and verify line condition.
Root cutting and/or hydro jetting to fully clear the pipe.
Re-camera to confirm the line is clean and suitable for lining.
Install CIPP liner (often full-length for recurring root issues).
Reinstate branch connections as needed.
Final camera verification so you can see the finished, continuous barrier.
If you’re in San Jose, Santa Clara, Campbell, Cupertino, Los Gatos, Palo Alto, Sunnyvale, Milpitas, Mountain View (and other Santa Clara / San Mateo County cities), Drain and Water can handle trenchless sewer repair and pipe lining with 24/7 availability when backups can’t wait.
