10 Benefits of Root Barrier Control Membrane Installation

Bamboo | 16th May 2021

Is a root barrier control membrane the right solution for your Japanese Knotweed invasion? Find out how to protect your property.

  1. The root barrier control membrane that we supply are scientifically tested and proven to block Japanese knotweed roots. Many commercially available root barriers aren’t robust enough to hold back Japanese knotweed rhizomes.
  2. We select barriers that do not need sand blinding or additional fleece protection, lowering the overall cost of root barrier installation.
  3. We can supply root barriers that are truly permeable, allowing the flow of nutrients through the soil but still completely effective at controlling root growth.
  4. Our root barriers can be used horizontally without causing puddling.
  5. Our permeable barriers stop water from pooling, which can lead to root spiraling or concentrations of fibrous roots near the barrier.
  6. Our root barriers can be heat welded to avoid joints or gaps where roots could penetrate.
  7. Root barriers are available in a wide range of sizes, from small gardener-sized rolls to larger format 5.2 meter wide rolls. Where larger sizes are required, the barriers can be heat sealed together with no loss of efficiency.
  8. We keep our full range of root barriers in stock.
  9. We offer a complete design service for Japanese knotweed cell burial design, based on your individual needs.
  10. Our robust impermeable barrier has a class-leading puncture resistance and our permeable barrier, crafted using geocomposite materials, is physically very strong.


The root barriers that we use

Permeable root barrier

As we understand it, the CuTex root barrier is the only geocomposite root barrier to have been scientifically tested and proven to block Japanese knotweed.

Because of its three-ply geocomposite construction, it’s a very robust, high strength root barrier. Cutex has a micro-perforated copper foil layer sandwiched between two polyproline sheets which allow moisture to pass through it. As it is permeable, the CuTex barrier can be used in many different situations. It can be laid horizontally to block knotweed, meaning that in certain situations, you can use a CuTex root barrier to limit the extent of excavation of knotweed contaminated material, diverting it away from landfill and making a significant saving on the cost of your Japanese knotweed removal project.

Flexible impermeable root barrier

Our Flexiroot barrier is an impermeable root barrier that is sufficiently flexible for use in many demanding situations. It has an impressive puncture resistance of 5,502 newtons – far greater than many other similar root barriers on the market. Due to its flexibility, this barrier is ideal for installing a bamboo barrier, thanks to its class-leading puncture resistance. Flexiroot is also one of the most cost-effective bamboo root barriers available.

Vertical Root Barrier


Vertical root barrier

We sell Cutex and Flexiroot barriers cut to size specifically so you can install them as vertical root barriers without having any unnecessary waste.

When installing a vertical barrier, it’s important to determine the depth of the trench that you will need to block all roots sufficiently. Once this is done, you need an additional 10%, as a root barrier may settle after installation. It is important to extend the root barrier above the ground as roots will ofter breach a barrier if this does not happen.



Helpful Resources

Need expert advice?

We hope that we have highlighted an effective approach to root barrier control. At PBA Solutions we routinely guide clients through the pros and cons of different barrier control options so if you want to benefit from our breadth of expertise in this area please feel free to contact us.

Just call 0203 174 2187 or 01202 816134 to talk to one of our consultants.



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