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Root Barrier C3


The Root Barrier C3 is a robust, triple-coated, twin-enforced, puncture-resistant linear barrier that has been designed to protect structures from root damage, resist root penetration and control the spread of invasive plants in the area such as Japanese Knotweed and Giant Hogweed.

These Root Barriers have been manufactured using polyethylene membrane giving it the strength and durability of a ground engineering fabric and the impenetrability of a geomembrane. The fabric is also highly resistant to natural acids, alkalis, bacteria and fungi.

As low as £60.00 £72.00
In stock

Quickest Available Delivery: Configure the product to view quickest available delivery time. Up To 5 Working Days Final shipping costs and times are calculated at checkout. Shipping address may affect available delivery methods & times.


Uses for Root Barrier C3:

  • Tree Pits – lining the sides of planting pits with C3 Root Barrier to control the spread of roots into the surrounding area where they can cause damage to property, pavements and services.
  • Foundations – installing a buried perimeter sheet wall of Root Barrier to prevent roots undermining foundations and control subsidence from ground shrinkage caused by trees drawing moisture out of the soil.
  • Service Channels – encasing new service trenches with Root Barrier C3 to protect pipes from root fracture and to provide a physical warning during any subsequent excavations.
  • Japanese Knotwood – used extensively for containment cells to protect clean soil, structures, hard surfaces and services from the spread of Japanese Knotweed. It can be used vertically to prevent the lateral spread of rhizome or horizontally to protect buildings and paved tarmac surfaces. Root Barrier C3 has a life expectancy of over 50 years which is a recommended requirement by the Environment Agency with Japanese Knotweed rhizome remaining dormant for at least 20 years.


Features & Benefits:

  • High Puncture Resistance (4,500N [EN ISO 12236])
  • Can be installed Vertically and Horizontally
  • Extremely flexible
  • CE marked
  • 50 Year Life Expectancy
  • Effective against Japanese Knotweed Weed, Hog Weed and other invasive weeds
  • Triple coated and thermally bonded twin reinforced layers
  • Tough and durable
  • UV stabilised
  • Impermeable membrane



The Root Barrier must be installed vertically and taut against the trench side nearest the tree. The Root Barrier must be finished at least 10mm above the final surface level to mitigate the potential for root overgrowth and allowance must be made for potential drag-down of the barrier during backfilling in deeper trenches.The raised edge can be embedded in concrete or butted against a curb for longer-term protection.

The trench face and backfill material must be free of sharp stones and debris to ensure that there is no possibility of the barrier being punctured. Any laps should be at least 500mm and sealed on the tree side using the Root Barrier adhesive lapping tape.

Surfaces must be smooth, clean and dry and the air temperature must be greater than 5 degrees. The membrane must be pressed down firmly to avoid entrapped air and when the sealing root barrier overlaps, joining tape must be applied centrally along the lap on the side facing the ree.

Care must be taken to avoid damage to the joining tape during backfill operations.



Material: Triple Coated, Twin Reinforced, Impermeable, Polyethylene Barrier Membrane

Puncture Resistance: 4,500N

UV Stabilisation: 400 KLy

Colour: Black

Weight: 365g/m2

Life Expectancy: Buried - durable for over 50 years in natural soils with pH between 4 and 9 and below 25 degrees, Permanently Exposed - expected half-strength lift of approx 7 years in UK conditions.


Our Tree Protection range includes three different types of Tree Protection Fencing installation for your development projects where trees must be preserved in the area. We have Tree Protection Fencing calculators available to provide a pricing and component breakdown for you instantly for the following types: Scaffolding Tube Tree Protection, Timber Post Tree Protection and Heras & Stabiliser Tree Protection.

In addition to our main Tree Protection Fencing range, we have Root Barriersystems, Tree Guards and Tree Mats all available to avoid harm to roots and to control spread.


Need any help? Contact Safe Fence Today.

Contact our team via phone 0121 725 2338, email or use our live chat feature between 8:00am & 17:00pm for help discovering our range.

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