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Tree Barrier Guide: Protect Property from Roots
Tree Barrier Guide: Protecting Property from Invasive Roots
A tree barrier redirects invasive roots away from sidewalks, foundations, and property lines, while letting the tree thrive where it is planted.
Table of Contents
A tree barrier (more precisely, a tree root barrier) is an underground wall that keeps a tree's roots from invading sidewalks, foundations, utilities, and neighboring property while letting the tree thrive where it is planted.
Key takeaways:
- A tree barrier redirects roots downward and away from structures you want to protect.
- Best installed when a tree is first planted so roots grow in the right direction.
- Solid HDPE, ribbed panels, and permeable fabric are the three main types.
- Plant trees at least 10 feet from a home's foundation when possible.
Why Trees Need a Barrier
Tree roots search for water and nutrients and will follow them under sidewalks, into foundations, and through plumbing. Left unmanaged, they lift hardscapes and crack concrete. A tree barrier provides a physical wall that channels roots safely downward.
Unmanaged roots lift and crack hardscapes. A barrier channels them downward.
When to Install
Barriers are most effective when installed at planting. A new tree's roots can be guided from the start, with no need to prune established roots. Around a mature tree, root pruning may be required, and cutting too close to the trunk can destabilize the tree, so proceed carefully or consult an arborist.
Mature trees near hardscapes are prime candidates for a tree root barrier.
Types of Tree Barrier
| Type | Best for |
|---|---|
| Solid HDPE roll | Long continuous runs along sidewalks, driveways, and property lines |
| Ribbed panels | Tight sidewalk cutouts where roots must be steered straight down |
| Permeable fabric | Areas that need water and air movement through the soil |
How Deep Should a Tree Barrier Go?
Depth depends on species and soil, but barriers are commonly installed from 18 inches up to 48 inches deep. Deeper material is used for vigorous, deep-rooting trees. Leave a small lip above grade so any surfacing root is easy to spot.
Barrier Selector Tool
Not sure which barrier height or thickness fits your project? Answer a few questions and get a recommendation, or request volume pricing for large jobs.
Use the Barrier Selector → Request a Quote →Recommended Tree Barriers
HDPE Tree Root Barrier Roll
Continuous 80 mil wall for sidewalks, driveways, and property lines. 100-year in-ground lifespan. Free shipping, made in the USA.
Shop HDPE Root Barrier →
Tree Root Barrier Panels
Ribbed panels for urban tree pits where roots need to be steered straight down.
Shop Root Barrier Panels →
Protect Your Property from Invasive Roots
Tree root barriers from Rhizome Barrier Supply keep roots out of sidewalks, foundations, and property lines. Free shipping. Made in the USA.
Shop Root Barriers →Frequently Asked Questions
What is a tree barrier?
A tree barrier, or tree root barrier, is a vertical underground wall that redirects a tree's roots away from sidewalks, foundations, and utilities while letting the tree grow normally.
How far should a tree be planted from a foundation?
Where possible, plant trees at least 10 feet from a home's foundation, and add a root barrier for extra protection against invasive roots.
Can I install a tree barrier around an existing tree?
Yes, but mature trees may require root pruning. Avoid cutting large roots close to the trunk, as this can destabilize the tree; consult an arborist if unsure.