Hi,we had one of these trees behind our house and the roots are very far reaching.The tree was a total nightmare all year round,shedding bark,leaves and seeds.They even ended up in my car bonnet.I moved 6 months ago and went back last week and was glad to see that my old neighbour had had the tree cut down.The roots had started to come up through the pavement.It had been cut down by about 20 feet only a couple of years before.I'd never seen such a fast growing tree.