Biobarrier (Trifluralin Fabric)
Long landscape run where trenching deep isn't an option? Biobarrier deflects roots with low-dose, time-release chemistry.
What it is
How time-release nodes deflect roots without trenching deep
Biobarrier is a permeable fabric with small polymer nodes containing trifluralin, a slow-release root-pruning herbicide. It is widely used internationally; UK usage is more limited and depends on current product approvals.
A fabric panel with sealed herbicide nodes that release at very low concentrations into the soil immediately around the fabric.
Best for
- Large landscape projects
- Areas where trenching depth is limited
Not ideal for
- Domestic gardens close to vegetable plots
- Sites where buyers want a non-chemical solution
Pros & cons
Biobarrier pros and cons
- Extremely long-lived nodes
- Permeable to water and air
- Chemical-based; not always preferred by homeowners
- Approval status varies; check with installer
How it compares
Biobarrier vs other root barriers
| Barrier type | Best for | Typical depth | Service life | Cost (£/lm) | Disruption |
|---|---|---|---|---|---|
| HDPE | Mature broadleaf trees within 10 m of a property | 1.0–2.0 m | 50+ years | £90 – £160 | Medium |
| Copper Geotextile | New tree planting near hardstanding | 0.3–0.6 m | 20+ years | £60 – £120 | Low |
| Biobarrier This page | Large landscape projects | 0.6–1.2 m | 15+ years | £100 – £180 | Medium |
| Concrete Barrier | Listed and high-value structures | 1.5–3.0 m | Permanent | £250 – £450 | High |
| Bentonite | Sites with active ground movement | 1.0–2.0 m | 50+ years | £140 – £220 | Medium |
| Deflector Panels | New tree pits in pavements | 0.6–0.9 m | 40+ years | £110 – £180 | Low |
All six barrier systems we install, with the page you're on highlighted.
Typical cost
£100 – £180 per linear metre installed
Material cost is the main driver. Best deployed on long, straightforward runs.
Installation summary
How we install Biobarrier
- 1. Mark out the protection line.
- 2. Excavate to the design depth.
- 3. Position the fabric with nodes facing the tree.
- 4. Backfill and reinstate.
Commonly used for
Species this barrier is specified for
Biobarrier is most often paired with these species. Each guide covers the recommended depth, thickness and install notes.
Common questions about Biobarrier
FAQ
Is trifluralin safe near food crops?
Manufacturers specify minimum standoffs from edible planting. We will only recommend Biobarrier where it is appropriate for your site.
How long do the nodes keep releasing?
Field data and manufacturer testing suggest active release for 15+ years from a correctly installed panel. Concentrations stay extremely low and stay in the immediate fabric zone.
Is it approved for UK use?
Approval status for trifluralin-based products in the UK has changed over the years and varies by application. We confirm current approvals before specifying it on any site.
Can I use it in a domestic garden?
Sometimes, but it is not our default for domestic work. HDPE membrane is normally preferred near homes and gardens with edible planting. Biobarrier sits more naturally in larger landscape and infrastructure projects.
Does it harm beneficial soil life?
The release zone is millimetres around the fabric. Wider soil biology is largely unaffected. That said, where customers want a non-chemical solution, we steer toward HDPE or copper geotextile.
What happens if the fabric is damaged?
Localised damage allows root penetration through the breach. The wider panel keeps working, but a damaged section needs cutting back and patching with a fresh overlap to restore continuity.
Tree near your home? Don't wait for cracks to widen.
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