In order to prove the bio-barrier performance of the proprietary ROOTX barrier system a laboratory test has recently been undertaken by REC Ltd and Amenity Contract Services Ltd. The test was performed on a mixture of plant species including mustard, docks, meadow grass and Japanese Knotweed within a peat and compost based soil matrix.
The trial was monitored over the duration of six months, over which period it was evident that the rhizome fragments of Japanese Knotweed were actively growing even beneath the ROOTX barrier. The field trial was conducted within a climate controlled environment (20°c) with daily addition of moisture to the surface of the soil.
Upon careful exhumation of the ROOTX barrier, which includes a copper foil insert sandwiched between a non-woven and woven geotextile, it was evident that none of the plants were able to grow through the bio-barrier. Typically the roots made their way down to the copper foil, where they either stopped or took a lateral route. None of the rootlets penetrated any of the needle punched holes, demonstrating the growth inhibition effect caused by the chemical properties of the copper foil insert.
It should be noted that the ROOTX barrier is a permeable system capable of transferring moisture through the geotextile sandwich and copper foil insert and therefore is not prone to water logging in field conditions. The laboratory trial proved that there was no water logging of the soil above the ROOTX barrier.
Visual examination of the ROOTX barrier showed the early formation of copper carbonate deposits (verdigris) which has been proved within earlier German based laboratory trials.
Further field trial and laboratory trials are to be conducted by REC Ltd and Amenity Contract Services Ltd and are expected to corroborate the existing research information on the ROOTX barrier.
For further information on the existing research information, applicability and cost for design, build and installation please contact us.