Roots do not break into a sound pipe. They follow moisture and vapour escaping from a joint that has already opened, send a hair-fine tip through the gap, and then thicken inside the pipe where there is water and no competition. By the time a drain blocks, the mass inside is often larger than the pipe's own diameter.
So the job has two halves. First we cut the roots back to the wall with a high-pressure jetter and, where the mass is solid, a mechanical root cutter. Then we line the run so every joint on it is sealed. One without the other is why people call a plumber about the same drain every spring.
Not sure which of our services you need? Start with a CCTV drain inspection — it is free with any quote and it decides everything else.