If your sinks are draining slow or there's a soggy patch in the yard that will not dry up, tree roots in your sewer line could be the reason. It's one of the most common calls we get from homeowners across Cobb, Fulton, Gwinnett, Cherokee, and Forsyth counties, and it almost always traces back to the same thing: a thirsty root that found a crack in an old pipe and never let go.
How Tree Roots End Up in a Sewer Line
Sewer lines carry warm water and a steady trickle of moisture, which makes them hard to resist for a root system that is looking for a drink. Roots don't punch through solid pipe. They find a hairline crack, a loose joint, or an old clay pipe seam, and they squeeze in as thin as a hair. Once a root gets a taste of that moisture, it thickens fast and can fill a pipe with a tangled mass in a year or two.
Oaks are some of the worst offenders because their root systems spread wide and chase water aggressively. Pines usually cause less trouble since their roots grow deeper and more straight down, but a mature pine planted too close to the house can still work its way into an old line over time.
Signs You Have Tree Roots in Your Sewer Line
A few warning signs tend to show up before things get bad.
- Slow drains in multiple sinks, tubs, or toilets at the same time
- Gurgling sounds from drains when the washing machine runs
- A sewage smell in the yard or near a cleanout
- A strip of grass that stays greener and grows faster than the rest of the lawn
- Sewage backing up into a tub or shower drain
One slow drain is usually just that drain. Several slow drains at once, especially if they back up together, points to a blockage further down the line, and roots are one of the most common causes. Roots can also show up above ground near the base of a tree. If you're seeing that too, our guide on tree roots above ground covers what's normal and what's not.
Why Georgia Red Clay Makes It Worse
Georgia red clay holds water close to the surface instead of letting it drain away fast. That keeps the soil around a sewer line damp, which is exactly what tree roots are hunting for. Add in a lot of older homes around Metro Atlanta with clay pipe from decades back, and you get a combination that practically invites roots to move in. The same clay is behind a lot of the driveway and foundation cracking we see too. Our post on tree roots and foundation damage goes into more detail on that side of things.
What to Do If You Suspect Tree Roots in Your Sewer Line
The first move is a camera inspection. A plumber runs a small camera down the line and can show you exactly where the roots are and how bad the damage looks. That inspection usually runs somewhere between $100 and $300, and it saves you from guessing or digging up the wrong section of the yard.
Once you know where the problem is, a plumber can often clear it with a mechanical auger or hydro jetting, which uses a high pressure water jet to cut roots and flush them out. That service typically runs a few hundred dollars depending on how far down the roots have grown. If the pipe itself is cracked or collapsed, it may need a full repair or a liner, and that job costs a lot more, often several thousand dollars.
Here's where we come in. A plumber can clear the pipe, but if the tree causing it stays put, the roots will find their way back. We look at the tree responsible and figure out whether root pruning, partial removal, or full removal makes the most sense for your yard.
Can You Remove Roots Without Killing the Tree?
Often, yes. A tree can lose a fair amount of its root system, especially on one side, and still stay healthy, as long as the roots close to the trunk are left alone. We generally won't cut roots within a few feet of the trunk since that's where a tree depends on them most for stability and food. For a deeper look at how much root loss a tree can handle, check out our guide on whether cutting tree roots kills your tree.
If the tree is old, already stressed, or sitting too close to the house to fix safely, removal might be the better call in the long run. We'll tell you straight if that's the case instead of trying to save a tree that's going to keep causing the same problem every couple of years.
Do Products That Dissolve Tree Roots in Sewer Lines Work?
You've probably seen products at the hardware store that claim to dissolve tree roots in sewer lines. Foaming herbicides and copper sulfate crystals can slow root growth inside the pipe for a while, but they treat the symptom, not the cause. The roots outside the pipe keep growing, and new roots usually find their way back to the same crack. We've seen these products buy homeowners a few extra months at best, not a real fix.
Homeowners insurance almost never covers root damage to a sewer line, since it's treated as gradual wear and tear rather than sudden damage. If a whole tree falls and causes damage, coverage can be a different story. Our guide on does homeowners insurance cover tree removal breaks down when a policy does and does not apply.
Preventing Roots From Coming Back
A few things help keep this from happening again.
- Plant new trees at least 10 feet from sewer lines, and further out for large oaks or maples
- Ask before you plant near a known sewer or septic line. Your county water department can usually mark it for you
- Consider a root barrier installed between a mature tree and the line if removal is not an option
- Get your line inspected every couple of years if you have large trees near your septic or sewer path
Tree roots in a sewer line aren't usually an emergency, but they don't fix themselves either. The sooner you deal with it, the less it costs and the less your yard gets torn up in the process.
If you're dealing with slow drains, a soggy spot in the yard, or a tree that keeps causing plumbing headaches, give Stanton Tree Service a call at (470) 914-3402. We'll take a look at the tree, tell you honestly whether root pruning or removal is the right move, and give you a free estimate before any work starts.