Live Oak Roots Damaging Foundation: Barrier and Pruning Options

Root Barrier Installation

Dig trench along foundation; install HDPE root barrier (30+ mil) vertically to 2–3 ft depth. Blocks root advance under slab.

Products: Root Barrier Specs

Surface Root Management

• Cover exposed roots with sand (not soil)—max 3"/year.
• Sand allows gas exchange; soil suffocates roots.

Selective Root Pruning

Can cut up to 25–30% of root system without killing tree. The 8-inch root 7–9 ft out is a candidate. Cut cleanly; backfill with sand.

Key Consideration

Live oaks are valuable. Barrier + selective pruning balances tree retention and structure protection. Monitor for stress after pruning.