Root Intrusion: Causes, Effects & Treatment
Root intrusion occurs when tree roots grow into underground plumbing or sewer lines, causing blockages, pipe damage, and drainage issues. This is a common problem in older sewer systems or areas with large trees near buried pipes.
How Does Root Intrusion Happen?
- Cracks & Weak Joints – Roots enter through small cracks, loose joints, or deteriorating pipe materials.
- Seeking Moisture & Nutrients – Tree roots naturally grow toward water sources, making sewer lines a prime target.
- Porous Pipe Materials – Clay, concrete, and cast-iron pipes are more susceptible to root penetration than PVC.
Signs of Root Intrusion in Pipes
- Slow Drains – Water drains slowly due to root blockages.
- Gurgling Sounds – Air pockets caused by roots obstructing flow.
- Sewage Backups – Toilets, sinks, or floor drains overflowing.
- Unpleasant Odors – Sewer gas escaping through cracks.
- Lush Patches in Yard – Rapid plant growth over buried sewer lines.
Root Intrusion Treatment & Removal Methods
Mechanical Root Cutting (Rooter Service)
- Uses a rotating blade to cut roots inside the pipe.
- Provides temporary relief, but roots can regrow.
Hydrojetting (High-Pressure Water Jetting)
- Blasts roots away using high-pressure water.
- Clears debris, grease, and sludge along with roots.
Chemical Root Killers
- Foaming root killers (copper sulfate, dichlobenil) coat pipe walls to kill roots.
- Prevents regrowth but doesn’t repair pipe damage.
Pipe Relining (Trenchless Repair)
- Inserts a liner inside the damaged pipe to create a root-proof barrier.
- Avoids digging up the yard and extends the pipe lifespan.
Sewer Pipe Replacement (For Severe Damage)
- Old pipes are dug up and replaced with PVC or HDPE, which are more resistant to root intrusion.
- Recommended if pipes are collapsed or heavily damaged.
Preventing Future Root Intrusion
✔ Use Root Barriers – Install physical or chemical barriers around pipes.
✔ Replace Old Pipes – Upgrade to PVC, which resists cracks and leaks.
✔ Regular Drain Maintenance – Schedule hydrojetting or root treatments annually.
✔ Strategic Tree Planting – Avoid planting trees near sewer lines.
