On the tree-lined Westside, roots are the number-one killer of older sewer lines. They creep into the joints, catch everything, and cause the backups that keep coming back.
Written bySteven Lockhart·Reviewed byMiguel Lopez, Owner & Licensed Plumber, New Pro Plumbing (CSLB #974600)·Last reviewedAugust 2026 · 5 min readQuick Answer
Tree roots get into a sewer line through tiny cracks and joints, drawn by the water and nutrients inside. They grow into a mesh that snags waste and causes recurring backups. Snaking or descaling clears them temporarily; the lasting fix is lining the pipe so there are no joints left for roots to enter.
A sewer line is a buffet for tree roots: warm, moist, and full of nutrients. Roots sense the moisture escaping from a tiny crack or a loose joint and grow straight toward it, then spread into a fine mesh inside the pipe that snags everything passing through.
Tree roots in sewer line — Root intrusion is the growth of tree roots into a sewer line through cracks or joints, forming a mesh that restricts flow and traps debris, leading to recurring blockages and, over time, structural damage to the pipe.
On the Westside’s mature streets and older clay laterals, this is the single most common reason people call for trenchless sewer repair — and the reason a snake only buys a few weeks.
We descale or hydro jet the line to cut roots back to the pipe wall — see a camera inspection first.
Lining the pipe with CIPP seals every joint, so roots have nowhere left to enter.
Removal is only half the job. Here’s the full sequence.
We scope the line to confirm roots and find every entry point.
We cut the roots back to the pipe wall and flush the line clean.
A second camera pass confirms the pipe is clear and shows joint condition.
We check whether the cracks and joints will let roots back in.
CIPP lining seals the joints into one smooth, jointless pipe.
We verify a root-proof finish you can see on screen.
Snaking again and again? Roots come back through the same joints every season — the only way to stop them is to line the pipe. Not sure how bad it is? Start with a camera inspection.
Roots backing up your line again? Let’s clear it and stop the cycle.
Get a Free QuoteClearing buys time; lining ends the cycle. Here’s how we decide.
| Approach | What it does | How long it lasts |
|---|---|---|
| Snaking | Punches through the roots | Weeks |
| Descaling / jetting | Cuts roots back to the wall | Months |
| CIPP lining | Seals the joints for good | ~50 years |
Weighing a permanent fix? See the no-dig sewer repair options and what they cost.
Clearing roots — snaking or hydro jetting — is a modest, recurring cost. Lining the pipe is a larger one-time investment that ends the cycle. For a line that backs up every season, lining usually pays for itself against years of repeat clearing. We scope first and quote both options flat-rate.
See our trenchless sewer repair cost guide for what lining runs, and decide with the numbers in front of you.
A Mar Vista homeowner has snaked the same clay lateral three times in a year. Each time the backup returns within weeks, thanks to a mature street tree.
New Pro hydro jets the roots out, then lines the pipe with CIPP — sealing the cracked joints the roots were exploiting.
The backups stop for good. No more seasonal snaking, and a sewer line rated for decades, with the tree right where it is.
The Bottom Line
Roots don’t quit — they come back through the same joints every season until there are no joints left to enter. Clearing them is a patch; lining the pipe is the cure. On the Westside’s tree-lined blocks, it’s usually the smarter money.
Roots are drawn to the moisture and nutrients escaping from tiny cracks and loose joints in an older pipe. They grow through those gaps and spread into a mesh inside the line, which snags waste and causes backups.
We cut them back with a powered auger or, better, hydro jetting, which scours the roots off the pipe wall. That clears the line — but unless the joints are sealed, the roots grow back through the same openings.
Through an unsealed pipe, yes — usually within weeks to months. The permanent fix is CIPP lining, which seals every joint into one smooth pipe so roots have nowhere left to enter.
Over time, yes. As roots expand they widen cracks and can displace joints, eventually leading to a partial or full collapse. Addressing them early keeps the fix to lining rather than replacement.
Usually not necessary. Lining the sewer line stops root intrusion without touching the tree, so you keep the shade and the plumbing both.
Recurring backups that snaking only fixes briefly are the classic sign. A camera inspection confirms it, showing the roots and the exact joints they’re entering through.
Written by the New Pro Plumbing content team and reviewed for technical accuracy by Miguel Lopez, owner and California-licensed plumber (CSLB #974600). Guidance follows U.S. EPA, CSLB, and LADBS sources where cited. Any figures reflect New Pro Plumbing's flat-rate practice and West LA conditions, not a quote — we confirm pricing in writing before any work begins.
Last reviewed: August 2026.
Honest diagnosis, flat-rate price agreed first, and a clean, code-compliant fix from a family-owned Westside plumber.
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