Nylex Rootex is a root control and barrier system used to prevent tree roots from damaging structures like walls, sidewalks, and planters. Without Rootex, tree roots can push up drains and walls over time as the tree grows. The roots can also cause cracking in concrete or loss of soil. Rootex is made of a flexible material that is cut to size and installed around the root ball before planting. It is overlapped and secured with metal clips to form a barrier that contains the roots and protects nearby infrastructure while still allowing the tree to grow. Proper installation following the outlined steps can prevent root-related damage and keep landscaping looking good.