A cable spins through the center of a root mass and punches a hole. Jetting hits the roots from every angle inside the pipe - cutting, stripping, and flushing the material out of the line in one pass. The result is a cleaner pipe wall, a wider recovered diameter, and a longer interval before roots regrow enough to restrict flow again.
Root intrusion cleaning is specifically scoped for lines where the blockage pattern is root-driven. That changes the nozzle selection, the pressure approach, and the post-cleaning assessment. A grease blockage and a root blockage in the same pipe require different cleaning strategies even though both restrict flow in the same way.
The visit does not stop at clearing the line. Once the roots are removed, the camera goes in to document the entry points - where the joints are compromised, where cracks have allowed penetration, and how much pipe wall remains intact between intrusion sites. That footage is what separates a one-time cleaning from an informed maintenance or repair decision.