Concrete limits the amount of water that reaches tree roots, such that they press up against the slab in search of moisture. Repairing the heaved concrete requires removing the roots, which can harm the health of the tree. Maintain a distance of two sidewalk widths between tree trunks and sidewalk edges to prevent problems, ConcreteNetwork.com recommends.
About this Author
Rogue Parrish has written two travel books and edited at the "The Baltimore Sun," "The Washington Post" and the Alaska Newspapers company. She began writing professionally in 1975. Parrish holds a summa cum laude Bachelor of Science degree in journalism from the University of Maryland.