Ashley Stansifer of Thrasher Basement Systems talks with Dave Washburn on Siouxland Business Spotlight about polyurethane foam injection concrete leveling. Concrete can settle unevenly over time because of poor soil conditions beneath the concrete materials. polyurethane foam injection involves a minimally invasive process to inject polyurethane foam through small holes drilled in existing concrete to lift the concrete material and create a fresh level surface. While polyurethane foam injection is a fairly new process, Thrasher Basement Systems have been experts in the foundation repair industry for more than 33 years. They are well-equipped to handle any foundation issues — big or small!