After ALL of our foundation lifts, we insist on grout pumping under pressure. This ensures that all voids are filled and prevents the intrusion of water by replacement of fill dirt that subsided. After the foundation is lifted, we complete the job by pressure grout pumping the area under the slab. Grout pumping reestablishes the fill that has subsided and prevents water from collecting under the foundation. This also prevents point loading of the slab which helps prevent the potential for future foundation problems. We have the equipment and training to provide true high-pressure grout pumping services. We do not consider grout pumping an option to leave off of a bid to keep the cost down in order to obtain the job.