Tree Roots Under House After Removal: Are They Still Alive? Will They Damage the Foundation?

You cut a tree six months ago but see living roots under your foundation. Here's what's happening and why you likely don't have a problem.

Root Biology After Tree Removal

• Roots store carbohydrates for spring growth.
• When the top is removed, roots attempt to re-sprout (coppice) to rebuild photosynthetic capacity.
• If you see green shoots: Roots are still alive and functioning.
• If no shoots after a full growing season: Roots are dying/dead.

Managing Living Roots

• Persistent cutting: Repeatedly remove all green shoots as they appear. Without leaves, roots starve.
• Herbicide option: Paint glyphosate on fresh-cut shoot stumps. It translocates to roots. Avoid contact with desirable plants.

Foundation Risk Reality Check

• Roots cannot thicken or expand without carbohydrate from leaves.
• Existing roots will slowly decay over years, creating minor voids—not structural pressure.
• Clay soils shrink/swell with moisture changes—this causes far more foundation movement than decaying roots.
• No documented cases of dead roots "growing" into foundations.

Bottom Line

If no foliage appears this growing season, the roots are dead. If shoots appear, keep cutting or treat with herbicide. Either way, the foundation risk is negligible. Focus on managing soil moisture around your foundation instead.