Oak Root Damage During Egress Window Excavation

Digging 5 feet deep for egress window, 7 feet from 30-foot oak. Hit 1-inch roots at 2-3 feet down. Owner worried about tree damage.

Root Distribution

Majority of roots in top 18-24 inches. Small roots at depth are less critical.

Damage Threshold

• Up to 20-30% root loss: expect some dieback on that side, but tree survives.
• Visualize: canopy spread = pie shape. Cut <30% of that pie = recoverable.

Best Practices

• Cut roots cleanly with sharp tools (not tear).
• Backfill promptly with native soil.
• Water deeply after construction.
• Fertilize lightly in fall.

Tree will likely show some stress but not die from this level of root pruning.