A 20-year-old Live Oak with 12-foot clearance to a U-shaped house shows minor walkway lifting. Research shows tree roots resemble a dinner plate, not a mirror of the canopy. Southern Live Oak (Q. virginiana) tolerates careful root pruning better than California species.
If trenching: cut only surface roots at or beyond the dripline. Install 18+ inch deep root barrier (DeepRoot, NDS, BioBarrier) to prevent regrowth toward structures. Monitor for stress: early leaf drop, dieback, reduced vigor.
12 feet is generally adequate for oaks. The garage walk lifting suggests roots found a moisture gradient under the pavement. Redirect irrigation away from foundation. Consider permeable pavement replacement for the damaged section.
Consult a certified arborist for on-site assessment before cutting. Oak species identification determines appropriate management.
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