Q&A: How to keep tree roots out of sewer line

QUESTION: Roots have been getting into the main sewer line in our front yard. The only nearby tree belongs to our neighbor, and he definitely wants to keep it. Our plumber says the roots will eventually do major damage to the line. If we sell the home, this will probably have to be disclosed to buyers. Is there any way to solve this problem? --Christine

ANSWER: The solution involves some hard work but is actually quite simple. The tree roots that grow toward the sewer line should be cut as close to the property line as possible. If you can dig a trench along the fence line, all of the roots that cross the trench can be severed. Before refilling the trench, ask the people at your local nursery about products you can bury that will retard root growth in the direction of your sewer line.

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