bob haller wrote:
over 15 years ago I had bad tree root troubles..........

so every spring I dump a 25 pound bag of rock salt in my wash tub and
mix with very hot water, this kills tree roots but leaves the trees
unaffected..

had a camera inspection every joint in the clay tile had tree roots
but one...

THIS REALLY WORKS!!

and is really cheap!

I have never tried this, and at this time I don't need to where all of my
properties are located (except for one). All of my properties (except the
one) have cast iron sewer lines and no trees or bushes in the area. For the
one exception property, I have one of those sewer line insurance protection
policies on that sewer line that the water company sells. Ordinarily, I
wouldn't even get one of those policies but this sewer line runs out to the
center of the street right under a HUGE oak tree at the curb. So, if I ever
have to replace that sewer line, it would be a big expense and not something
that I could do myself.

But, about the salt idea...., I did used to have a property where roots were
a recurring problem. Since I no longer own the property, it is not an issue
for me. But, if I did do the salt idea, I am guessing that it would be good
to be able to block off the sewer line near the curb vent if possible, and
then let the hot rock salt water fill up the sewer pipe and stay there for
as long as possible before opening up the sewer line again. Do you do that
or something similar?