This foundation repair job in Houston, Texas required both internal and external Bell Bottom Piers. Frequently when internal piers are installed and the building or home is leveled a void will be created under the foundation around the internal piers. This is the area where the soil settled and the foundation “fell inward.” Although the interior portion of the foundation has new support with the Bell Bottom Piers, it is standard procedure to fill the void with a mixture of cement and soil to give greater support. This process is called mud jacking or mud pumping. Please click the following link to learn more about mud pumping. Houston, Texas – Foundation Repair Testimonial Letter #34