How Tree Roots Enter Sewer Lines—and How to Stop

Tree roots growing toward moisture can be a hidden cause of sewer backups. Even when a pipe is “working,” microscopic leaks, aging joints, or small breaks can let water and air escape—creating an attractive path for roots to enter and expand.

How roots get into sewer lines
In many cases, roots do not break through sound pipe by force. Instead, they exploit vulnerabilities. Cracks in pipe walls, gaps at joints, collapsed sections, or connections that have shifted over time can allow roots to reach the interior where moisture and nutrients are available.