Tree Roots in Sewer Lines: Removal and Repair

Roots from mature trees get into clay and old cast iron laterals and back up the basement, often in the same season each year. We cut them out, film the line and show you what ends it.

Tree Roots

Signs roots are in your sewer line

Roots start as fine hairs at one joint, catch paper and grease, and thicken into a mat. The first signs show at the lowest drain in the house while upstairs fixtures keep working.

The season gives it away: a main line that backs up at the same time every year is usually rooted, and cutting alone only buys time. If sewage is on the floor, call for 24/7 main sewer line clog clearing.

  • Floor drain gurgling or filling as the washer empties
  • Basement toilet slow while upstairs drains run fine
  • A backup that clears overnight, then returns
  • A sunken strip of lawn over the line, a sign of broken pipe
AquaTec mascot feeding a drain cable into a basement floor cleanout, where root cutting on a sewer lateral starts
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Root cutting gets the drain working again. The camera footage we take afterwards decides whether next year looks the same.
Older Laterals

Which homes and pipes get roots

Roots need an opening. Clay tile comes in short lengths joined at bells, and old cast iron has packed hub joints that loosen with age. Plastic lines in newer subdivisions seldom root.

Thornhill

Post-war clay laterals under big trees in Royal Orchard, Bayview Glen and Thornhill Village. See plumbing in Thornhill.

North York

Willowdale and Don Mills bungalows often pair cast iron drains with a clay lateral. See North York drain cleaning.

Newmarket And Aurora Cores

Century-old houses around Main Street South in Newmarket and Town Park in Aurora, often still on clay or cast iron.

Mill Pond, Richmond Hill

Mature trees over original laterals near Mill Pond and along Yonge. See plumbing in Richmond Hill.

Older Streets We Serve

Root cutting, camera work and lateral repair from AquaTec Plumbing, licensed and insured plumbers based in Holland Landing.

Clearing The Line

Root cutting and hydro jetting

A toothed root blade on a cable machine shears the mat; a jetter scours what it leaves, if the pipe can take it.

1

Open The Cleanout

Usually by the front foundation wall; otherwise through a basement toilet, and we say so first.

2

Cut The Mat

A blade just under pipe size runs toward the street and returns with cuttings we read: root, paper or clay shards.

3

Jet If The Pipe Allows

After a quick camera look, sound pipe gets a root nozzle that scours regrowth and flushes out sand. Cracked or thin pipe does not.

4

Test Under Load

We run the washer and watch the floor drain take it without a gurgle.

Camera Inspection

Camera inspection after clearing

A cleared line only proves it drains. With the pipe rinsed, the camera runs the whole lateral while you watch, a counter logs the distance to each fault, and a transmitter in the head lets us mark its spot and rough depth on the lawn.

  • Rooted joint. Roots at the seam, pipe intact either side.
  • Offset joint. A dropped length leaving a lip.
  • Crack or broken bell. Missing pieces, sometimes soil showing.
  • Sag. A low spot where water covers the lens.

More on sewer line repair and replacement and hydro jetting and drain camera inspection.

AquaTec mascot beside a drain camera monitor and a coiled jetting hose, used to inspect a sewer lateral after roots are cut
Repair Options

Spot repair or lateral replacement

The footage usually makes the choice plain, and the price is in writing before any digging.

Spot Repair

One or two bad joints on sound pipe: one excavation, the rooted length cut out, new PVC joined with shielded couplings.

Lateral Replacement

Roots at joint after joint, or clay cracked along its run: we replace the line from the house toward the property line in PVC.

On The Day

Utilities are located first. Expect a trench, drains out of use while we work and a camera pass before backfill.

What Moves The Price

Depth, length, failed joints, what covers the line (lawn, interlock, driveway or the tree), any permit and restoration.

Property Line

Your side of the lateral and the city's side

Responsibility is usually split at the property line: the pipe under your lot is yours, and the section under the boulevard to the main is the municipality's. Roots ignore that line, so the camera's distance reading matters.

If the damage is past your line, we show you the footage and distance to take to the municipality. In Thornhill that is Vaughan west of Yonge or Markham east of it (see drain cleaning and root cutting in Thornhill); North York is the City of Toronto.

AquaTec mascot laying new sewer pipe in a trench in front of a house, on the private side of the lateral
After The Repair

Keeping roots out after the repair

Sealed PVC joints take away the entry points. Planting and upkeep decide the rest.

Plant Clear Of The Line

Keep thirsty trees such as willow, silver maple and poplar away from the lateral's route; shrubs are safer over the pipe.

Know The Route

On the camera visit we can trace the lateral across the lawn before you plant or lay interlock.

Clearing On A Schedule

If replacement is not yet in the budget, regular cutting keeps a sound, rooted line open, timed from how fast roots returned on camera.

Catch It Early

A slow floor drain or a gurgle as the washer empties is the cue to call.

Common Questions

Tree root sewer line FAQs

What homeowners ask when roots keep backing up the sewer line.

Why do tree roots come back after my sewer line is cleared? +
Cutting removes the roots inside the pipe, but the open joint and the root outside it remain, so regrowth starts there again. Repairing those joints, or replacing the rooted run, ends the cycle.
Is root cutting or hydro jetting better for roots in a sewer pipe? +
They work together: a root blade shears the mat, then jetting scours fine roots and silt off the pipe wall. We jet only pipe the camera shows is sound.
Can I keep having the roots cut instead of repairing the line? +
Often, when the footage shows intact pipe with roots only at the joints. Not when it shows offset joints, broken pipe, a sag or soil coming in, which only get worse.
Who is responsible if the roots are past my property line? +
Usually the municipality, since the section from the property line to the main is generally theirs. We show you the footage and the measured distance to take to them.
What affects the cost of removing roots from a sewer line? +
Access, line length, root density and whether jetting or a camera pass is needed; for a repair, depth, failed joints and what covers the pipe. The price is in writing before work starts.

Same backup, same time every year?

We cut the roots out, camera the lateral and tell you what it needs.

AquaTec Plumbing mascot giving a thumbs up