Our root barrier sheet material is a popular solution to keep the roots or a tree or shrub from penetrating and weakening pavements, driveways, walls, or building foundations. We recently made a switch with out root barrier sheet material, moving from a product manufactured from HIPP to one made from HDPE (containing 50% recycled materials in both cases). The product has a similar appearance and technical performance with one important difference: the HDPE is more flexible than the previous material, and more resistant to some of the more aggressive roots, like that of bamboo.