Sewer lines
Tree Roots in Your Englewood Sewer Line: What to Know
In older Englewood homes, the sewer lateral running from the house to the city main, often under the back alley, is frequently old clay pipe with joints that tree roots find and grow into. The roots form a mesh that catches waste and causes slow drains and recurring backups. Cabling cuts the roots back, hydro jetting scours them out, and a camera shows whether the pipe itself needs relining or replacement. Here is how to recognize a root problem and what the real fixes are.
Why roots are such a common problem here
Many of Englewood's older neighborhoods were built with the sewer lateral, the pipe carrying waste from your house to the city main, running out the back of the property to a main under the alley. In homes of that age the lateral is often vitrified clay, laid in sections with joints every few feet. Clay is durable, but those joints are not root-proof, and over decades they shift slightly, letting in the small amount of moisture and nutrients that tree roots are exquisitely good at finding. A root that reaches a joint grows into it, then keeps growing inside the pipe, branching into a mesh that snags toilet paper and waste until flow slows and then stops.
Englewood has mature trees, alley plantings, and the freeze-thaw ground movement of a Front Range winter that works joints loose over time. All of it favors root intrusion in exactly the older laterals most likely to have vulnerable clay joints.
The warning signs of a root problem
Roots may be in your lateral if you notice
- Multiple drains slow at once, or the lowest drains (basement, first-floor toilet) back up first
- Gurgling from a toilet or drain when another fixture or the washing machine runs
- Recurring backups that clear for a while and then return, often on a seasonal rhythm
- Sewage odor in the yard or a patch of unusually green, fast-growing grass over the lateral's path
- A toilet that drains slowly and plunging does not fix for long
The tell that points at the lateral rather than a single fixture is that the problem affects the whole house, and that it comes back. A clog under one sink is local; a lateral full of roots shows up as the lowest fixtures backing up and a problem that returns no matter how many times you plunge. When that is the pattern, the issue is downstream in the sewer line, and a camera inspection is how you confirm it.
How the problem is diagnosed and cleared
The starting point is almost always a camera run down the lateral, which shows exactly where the roots are, how bad the intrusion is, and, importantly, what condition the pipe itself is in. That last part matters because roots are a symptom; the vulnerable joints are the cause, and knowing whether the clay is merely jointed or actually cracked and collapsing decides whether cleaning is enough or the pipe needs work.
For clearing, there are two tools. Cabling, or rodding, runs a rotating blade down the line to cut the roots back and reopen flow; it is fast, effective at restoring drainage, and often the right first response to a backup. But cabling cuts the roots, it does not remove the mass, so they tend to grow back. Hydro jetting uses high-pressure water to scour the pipe wall clean, cutting the roots out more completely and flushing the debris away, which buys a much longer interval before regrowth. On a root-prone lateral, jetting is frequently the better clean, provided the camera shows the pipe is sound enough to take it.
| Approach | What it does | Best when |
|---|---|---|
| Cabling / rodding | Cuts roots back, restores flow fast | An active backup that needs clearing now |
| Hydro jetting | Scours roots and debris out more fully | Recurring roots in a structurally sound pipe |
| Trenchless relining | Seals a new liner inside the old pipe | Cracked or leaking clay with recurring intrusion |
| Excavation and replacement | Replaces a failed section of lateral | Collapsed or badly broken pipe |
When cleaning is not enough
If the camera shows the clay is cracked, offset at the joints, or starting to collapse, cleaning will only ever be a temporary fix, because the roots have a permanent way in. At that point the durable answers are trenchless relining, which cures a new seamless liner inside the old pipe and seals out the roots without digging up the alley, or, where a section has actually failed, excavation and replacement of that run. Trenchless methods are often available even under an alley or driveway, sparing the surface, and a good plumber will tell you honestly which your pipe needs based on what the camera shows, rather than selling a full replacement when a reline or even a regular jetting schedule would do.
For a lateral that is sound but simply lives near hungry trees, the practical long-term plan is often a periodic jetting on a sensible schedule, catching the roots before they cause a backup rather than after.
What a homeowner can do
You cannot keep roots out of an old clay joint from inside the house, but you can avoid making a backup worse and catch problems early. Do not keep flushing or running water once a backup starts, since it has nowhere to go. Keep wipes, grease and anything fibrous out of the drains, because those are what the root mesh catches and turns into a full blockage. And if you have recurring slow drains, get a camera inspection rather than living with it; knowing the pipe's real condition is what lets you choose the right fix instead of paying for repeated emergency clearings. A camera run is often done as part of drain cleaning once a backup has returned a second time, which is the point where guessing stops being worth it.
Common questions
Why do tree roots get into Englewood sewer lines?
Older Englewood laterals are often clay pipe laid in jointed sections, frequently running under the back alley. The joints let in trace moisture and nutrients that tree roots grow into, then branch inside the pipe until they snag waste and cause backups.
How do I know it is roots and not a normal clog?
A root problem affects the whole house, the lowest drains back up first, and it keeps coming back no matter how much you plunge. A single slow sink is usually a local clog. A camera inspection confirms roots and shows the pipe's condition.
Is cabling or hydro jetting better for roots?
Cabling cuts roots back fast and is good for clearing an active backup, but they regrow. Hydro jetting scours the pipe more completely and buys a longer interval before regrowth, as long as the camera shows the pipe is sound enough to take the pressure.
Do I have to dig up the yard or alley to fix it?
Often not. If the clay is cracked or leaking, trenchless relining can seal a new liner inside the old pipe without a long trench, even under an alley or driveway. Excavation is reserved for a section that has actually collapsed.
Can I stop roots from coming back?
You cannot seal old clay joints from inside the house, but on a sound pipe a periodic hydro jetting schedule keeps roots ahead of a backup. If the pipe is cracked, relining is what permanently seals the roots out.