I would like to know about the root system of the weeping Alaskan Cedar. The landscaper planted the tree about 3 feet from the house and after 9 years, it is 15 ft. high. I am worried about the root system destroying the concrete slab of the house and the hot water tubes in the slab. I wanted to move it and the nursery said there should be no problem with the tree. I do not believe him. Anyone know about the root system??