Hmm. It sounds like a problem tree to me. What sort is is? Are there any
roots doing the same sort of thing to the foundations of the house? Have you
thought about taking it out and replacing it with something more suitable?
Here in Melbourne at least, the prices for removing trees seem to have
dropped considerably. I have just had a quote which would have been double a
couple of years ago. You might find that the root barrier option works out
to be just as expensive as removing the tree - not to speak of the cost of
possible damage to buildings.
I hope this helps.
Cheers,
Alwynne
"Mike Buckler" wrote in message
...
On Mon, 3 Mar 2003 19:37:12 +1100, "alwynne mackie"

wrote:

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.

The roots are pushing against the fence rather than trying to go through
it.
A case of too many roots and not enough space. The roots hit the fence
just
below the soil surface then dive straight down 50cm, go under the fence
and
disappear into the council owned park next door.

The roots vary in size from 2 cm to 10 cm in diameter. A concrete asbestos
fence backed by several tons of sand is no match for this tree. I need
something that will inhibit the growth of the roots once they have been
cut
back.




Mike