We had a Rowan tree in our garden that I cut down some time back, but it was very near the drive were the drains run. Rodding the drains I know how far the rubber will go, and it blocks just about where the tree used to be so I'm guessing it's a root that is the problem.
The drive slopes upwards at the point where the blockage is, so it's very thick concrete. It's also a shared drive with our neighbour, so digging it up is really a last option. Anybody got any suggestions to look at what might be the problem and if it is a root deal with it without digging up the drive please?