wrote in message
oups.com...
My ignorant neighbor planted 2 siberian elms right at the fence line
which is less than 6 feet from my back door. He also has a birch and
willow exceeding 30 feet approx 15 feet from my back door. All of
these trees are sitting on my roof and the siberian elms are reaching
into my backdoor and bedroom windows. He neglects them, won't trim
them and will not give me permission to cut them back. I live in
Canada and the law states that I cannot touch them. My only option is
to go to court.

Today we removed our badly cracked and heaved sidewalk and patio and
found enormous roots coming from my neighbors yard. These were the
culprits that destroyed all of the concrete. We axed massive roots
and I want to know if I can apply anything to kill the actual trees.

My elderly neighbor is also paying the consequences for this guys
ignorance. The willow has destroyed several of her trees and is
causing damage to her sunroom. He also told her where to stick it.

I care for special needs foster children and do not have the time or
desire to take this to the courts. Is there anyway to kill the trees
from the exposed roots that are covering my lot?

Any suggestions would be appreciated!

It is a common law almost everywhere that you can trim overhanging limbs,
usually by city ordinance. Googling Canadian law, there does not seem to be
any universal conflict with this. Consult with your city government.
However, there does seem to be issues regarding the cutting of roots as
you have done, and most probably laws against poisoning your neighbour's
trees.
So, unless your city specifically restricts your cutting of overhanging
limbs, you've gone about this the wrong way, and may be in jeopardy of being
in court anyway, this time as a defendant.