We purchased our home 3 years ago, not knowing we shared a main sewer line with the neighbor next door. The main sewer line runs through our side yard. Their house backed up…after much discussion (not all nice) the neighbor got off of the line and now has his own. Our problem now is that there are three huge root balls left in the main sewer line which belongs solely to us now. What would be the best way to attack this problem and I would think our neighbor would be responsible for this problem also. HIS tree is causing the root ball problem.
The long term solution may be to replace the sewer. If roots have penetrated in three spots, there certainly many other places where they have gotten a start also. These other locations will eventually become their own “root balls”. And until someone devises a way to tell trees to keep their roots and leaves on their own property, it is solely your problem. And even if the neighbor cut down the tree tomorrow, it would still be your problem 20 years from now.