www.HMICompany.com Concrete Raising There are two different methods for raising settled concrete: Mudjacking and Polyurethane Foam Concrete Raising. Raising concrete is commonly half the cost of replacing settled concrete. Polyurethane Concrete Raising Injects a two part mixture that reacts and expands into a lightweight material. The expanding material fills voids, supports, and raises the concrete slab. Mudjacking A grout mixture is hydraulically pumped under a slab. After the voids are filled, the pressure from pumping in the material supports and lifts the concrete slab. For over four decades, HMI has assisted thousands of entrepreneurs entering into business. Committed to your success with training and continuous support, HMI offers the benefits of a franchise without the restrictions. No obligation seminars teach you how to be successful in the business of concrete raising and leveling. With experts a phone call away, HMI is ready to share our knowledge and demonstrate how profitable the concrete raising business can be for you! How It Pays Off For You .