Key Takeaways
- Roots grow into the joints of old clay and cast iron sewer laterals.
- Slow drains, gurgling and a recurring sewer backup are the classic signs.
- Clearing roots helps, but they grow back. Repairing the pipe fixes it.
- Plant new trees well away from the sewer lateral.
Why Rockville, MD Has So Many Root Problems
Neighborhoods like Twinbrook, Hungerford, the West End and Rockcrest have tree-lined streets that are now 60 years old or more, and so are their sewer laterals. Those laterals are often clay or cast iron, with joints every few feet. Roots seek out the water and nutrients leaking from those joints, slip inside, and keep growing.
Signs of Roots in Your Sewer Line
- Several drains slow at once, especially the lowest ones
- Gurgling toilets and drains after you run water
- Backups into a basement floor drain or tub
- Clogs that come back weeks after being cleared
- Sewer smells outside, or unusually green, soggy patches in the yard
If the clog keeps coming back in the same season each year, roots are a very likely cause. They grow fastest in late spring and summer.
Clearing Roots vs. Fixing the Pipe
| Approach | What it does | How long it lasts |
|---|---|---|
| Snaking / root cutting | Clears the line | Months, roots regrow |
| Regular maintenance cleaning | Keeps roots in check | Ongoing |
| Spot repair | Replaces the damaged section | Long term, if the rest is sound |
| Lateral replacement | New pipe from house to main | Long term |
Clearing the line gets water flowing again, but the opening in the pipe is still there. When roots return every year, or the pipe is cracked or sagging, repairing or replacing the damaged section is the real fix. Our sewer services cover both, and our drain cleaning guide explains maintenance.
If sewage is backing up into the house, stop using water everywhere and keep people and pets away from it. Call a 24/7 plumber.
Is the Sewer Lateral Your Responsibility?
In general, the homeowner owns the lateral from the house to the public sewer, but confirm with the City of Rockville or WSSC Water. Our guide to water and sewer line responsibility in Rockville explains it.
Preventing Root Problems
- Plant new trees and large shrubs well away from the sewer lateral
- Know where your lateral runs before landscaping
- Clean the main line periodically if you've had root problems
- Replace damaged clay or cast iron sections with modern pipe
We clear and repair sewer lines across Rockville and nearby Kensington, Wheaton and Takoma Park, where the same mature trees cause the same problems.
