Tree Root Damage: Protecting Foundations and Pipes

Trees are wonderful — until their roots crack your driveway, invade your sewer line, or threaten your foundation. Root problems are common in Southern California, especially with the wrong tree planted too close to the house. Here's how to prevent and manage tree root damage.

How roots cause damage

Roots seek water and oxygen, and they can lift hardscape, infiltrate cracked pipes, and in some cases affect foundations — particularly in our expansive clay soils, which shrink and swell with moisture. Most damage comes from aggressive-rooted species planted too near structures.

Prevention starts at planting

• Right tree, right place: plant large trees well away from the house, driveway, and sewer lines.
• Avoid aggressive species near structures: some ficus, poplar, and willow are notorious for invasive roots.
• Install root barriers: when planting near hardscape, a root barrier directs roots downward and away.

Managing existing root issues

If roots are already causing problems, options include installing root barriers, careful root pruning (done by a professional to avoid destabilizing the tree), and repairing or relining affected pipes. Never cut major roots without expert guidance — removing too much can make a tree unstable and hazardous.

Roots in sewer lines

Roots entering a cracked sewer line cause recurring backups. Fixing the underlying pipe (lining or replacement) is the real solution; simply cutting roots offers only temporary relief. An arborist and a plumber often work together on these cases.

Frequently asked questions

Can tree roots really damage my foundation?

Directly cracking a sound foundation is uncommon, but roots can worsen soil movement in clay and damage pipes and hardscape. Proper planting distance prevents most issues.

Is it safe to cut tree roots near my house?

Cutting large roots can destabilize a tree and create a hazard. Have an arborist assess before removing any significant roots.

Arbol Roble has cared for Inland Empire landscapes since 1997, serving Rancho Cucamonga, Ontario, Fontana, Eastvale, Corona and Riverside. Request a free quote or browse our residential and commercial services.