You can certainly get ordinary root barrier material in various sizes and
thicknesses quite easily. But why do you want one that leaches a herbicide?
It will kill/inhibit anything that comes into contact with it - maybe things
that you want. And if it is on a boundary and kills your neighbour's plants,
you may have trouble on your hands.
I have used the normal sort to repel/contain such things as running bamboo
very successfully.
Cheers,
Alwynne
"Mike Buckler" wrote in message
...
Does anyone know if Biobarrier (or anything similar) is sold in
Australia?

I have a problem with tree roots pushing against an asbestos fence causing
it
to lean over. Given the size of the roots and the vigorous growth of the
tree, trimming the roots may only be a short term solution.

Biobarrier is a fabric that you bury in the ground and slowly releases
trifluralin which is some kind of herbicide/root inhibitor. The sales
blurb
at www.biobarrier.com says that it works for up to 15 years.

Mike