Root barriers, also called root shields, are a highlyeffective preventive maintenance measure done to protect your home's foundation from tree roots that are drawing moisture away from the foundation. Kenny Dutton with DuWest Services demonstrates how the barrier is installed. Remember the foundation is best maintained when the moisture levels are kept consistent to prevent movement. The root barrier allows the moisture to be held on the homeside of the barrier. The root barrier installation will not shorten the life of the tree, but will have a big impact on the health of your home's foundation.