Massive Oak Near House: Root Depth and Stability Facts

An 11-foot diameter oak 20 feet from a house, and an 8-foot diameter oak 10 feet from a garage. Owner's friend wants them cut, fearing they'll fall. Owner argues roots are deep.

Root System Reality

• Majority of roots in top 2-3 feet of soil.
• Some roots go much deeper.
• Root spread = 1.5x canopy width—this provides stability.

Wind Stability

Trees this large have survived decades of storms. Wind action strengthens root systems. Healthy oaks don't just "fall over."

Cost of Removal

• Enormous expense ($thousands).
• Loss of shade increases cooling costs.
• Zero risk justification for healthy trees.

Keep the trees. They'll outlast the owner. Consult an ISA-certified arborist for a formal risk assessment if needed.