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Tree Roots Damaging Foundation or Sewer Line
in Columbia, MO
A lot of Columbia homes, especially those built before 1970 in areas like Old Northeast and Benton-Stephens, still have clay tile sewer pipes in the yard. Those pipes crack with age, and tree roots find those cracks fast. The heavy clay soil here also keeps roots near the surface, so a tree 15 feet from your foundation can still reach it.
Quick Answer
Tree roots in Columbia grow toward any source of water, including the tiny cracks in older clay sewer pipes and the damp soil along foundation walls. Once roots get inside a pipe, they expand and block it completely. Removing the tree stops new root growth, but existing roots in the pipe still need to be cleared by a plumber. Call (573) 615-8401 if your drains are slow and a large tree is within 20 feet of the house.
Telltale Signs
Warning Signs to Watch For
- Multiple slow drains or gurgling sounds coming from floor drains
- Sewage smell in the yard, especially after heavy rain
- A crack in the foundation wall that runs in a curved or diagonal line
- Sections of the yard that are always wet even when it hasn't rained
- Tree roots visible above ground and heading toward the house
- Toilet backs up when you run water in another part of the house
Root Causes
What Causes Tree Roots Damaging Foundation or Sewer Line?
Roots Infiltrating Clay Sewer Pipe
Homes built before 1960 in Columbia commonly have clay tile sewer lines. These pipes develop hairline cracks as the ground shifts, and roots sense the moisture and nutrients coming from those cracks. Once inside, roots fill the pipe in a season or two.
The Fix
Tree Removal Plus Pipe Camera Inspection
Removing the tree stops the source of root pressure. A plumber then runs a camera to find where roots entered and decides whether to hydro-jet, line, or replace that section of pipe.
Surface Roots Lifting Foundation Footing
Columbia's wet springs cause trees to keep most roots in the top 18 inches of soil. When those shallow roots grow under a concrete footing, they lift it as they thicken, and that movement cracks the foundation wall above.
The Fix
Tree Removal and Root Barrier Installation
The tree is removed and a physical root barrier is cut into the soil between the stump and the foundation. This keeps any remaining roots from continuing toward the house while the stump decomposes.
Drought Stress Causing Soil Shrinkage
Columbia summers regularly hit stretches with less than 2 inches of rain per month. When clay soil dries out, it shrinks and pulls away from the foundation. A large tree nearby pulls even more moisture from the soil, making the shrinkage worse and creating voids under the footing.
The Fix
Tree Removal and Foundation Assessment
Removing the tree reduces the moisture demand on that soil. A foundation contractor should then check whether the voids that formed have caused settlement that needs to be addressed separately.
Self-Diagnosis
Which Cause Applies to You?
Check the signs you're observing to narrow down the likely root cause before your inspection.
| What You're Seeing | Roots Infiltrating Clay Sewer Pipe | Surface Roots Lifting Foundation Footing | Drought Stress Causing Soil Shrinkage |
|---|---|---|---|
| Slow drains in multiple fixtures at the same time | |||
| Diagonal crack in foundation wall near a large tree | |||
| Yard stays wet near the sewer cleanout after dry weather | |||
| Gap opening between foundation and soil during summer dry spells | |||
| Visible surface roots running directly toward house | |||
| Sewage odor outside near the tree base |
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