Be carefull about rotovating the roots - apart from the risk of injuring yourself when the rotovator blade sticks in a big root and you and the rest of the rotovator start rotating instead, there is also a liability issue involved if you knowingly damage the tree to the extent that it is no longer stable. You can imagine the conversation . . .
Garda - so, this big tree fell, have you any idea what caused it ?
You - yes, I cut the roots to kill the tree
Garda - and what happend then ?
You - well, the tree eventually died due to the weakened roots, then along came a storm and the tree fell down.
Garda - on your house, yes ?
You - erm, yes . . .
Garda - and you want me to do what ?
z
Garda - so, this big tree fell, have you any idea what caused it ?
You - yes, I cut the roots to kill the tree
Garda - and what happend then ?
You - well, the tree eventually died due to the weakened roots, then along came a storm and the tree fell down.
Garda - on your house, yes ?
You - erm, yes . . .
Garda - and you want me to do what ?
z