Tree roots do not normally enter an intact, sealed sewer pipe simply because a tree is nearby. When roots are present inside a line, they have found a path through a joint, opening, crack, or another vulnerable point. Once inside, they can catch debris and reduce the space available for wastewater to move.
How roots become a drainage problem
Small root growth can expand over time. Material moving through the sewer can collect around it, creating a larger restriction. Symptoms may include slow drainage, recurring main-line backups, or several fixtures being affected together.
What mechanical root cutting does
Mechanical cutting or high-speed milling can remove intrusive root material from accessible portions of a sewer line when appropriate. The immediate goal is to restore usable flow and clean the affected area.
Root removal is not pipe repair
Cutting roots does not repair the opening that allowed them into the pipe. Roots can return if the underlying entry point remains. Camera inspection may help document visible line conditions and inform whether additional evaluation or repair by an appropriate contractor should be considered.
Use the Pipe Patrol Drain Diagnostic to organize what you're seeing before requesting service.
This information is general education, not a diagnosis of a specific drainage system. Actual conditions can only be evaluated from the property and accessible portions of the line.