Do Root Barriers Protect Foundations from Tree Roots? Expert Analysis

Foundation repair company says hollies near foundation take more water than trees, should be removed. Homeowner asks about root barriers for a 22-yr-old tree 15 ft away (North Texas clay).

Shrub Water Use

Hollies cannot match a tree's water uptake. Keep shrubs ≥5 ft, trees ≥15 ft (or canopy spread) from foundation.

Clay Shrink/Swell

Uniform moisture = stable. Wet/dry cycles = movement. Footing drain, gutter extensions, clay cap, or concrete apron stabilize moisture.

Root Barriers: Not Proven

• Roots go under/over.
• May help clay retain moisture (balanced).
• Can harm tree (forces roots down).
• Tree removal ($500–$1,500) often cheaper than barrier ($600+).

Best Practice

Right tree, right place. Manage moisture with drainage, not barriers.