My parents have a home on a floating slab that is falling apart. There a several cracks in the ceiling and in the walls. They had them fixed a few years ago by the insurance. The insurance refused to fix the slab, but they fixed a water leak under the slab and gave them enough money to fix the wall and patch up the floor from where the contractors dug up to find the leak. Is there a way that they can get the insurance to fix the slab. If not what is the best way to fix the problem permantly and cost effient. They live in San Antonio, TX and I believe the soil is called "black, sandy soil. I have heard of the jacks that they put under the house. Is that the best way? What ever the most effective and least expensive (if possible) is can you tell me and about how much the procedure will cost since I will most likely be paying for this to be done to there house. Also, is there anything that I can do to lowere the costs. The numbers I want are to repair the foundation and not the cracks in the drywall inside the house. Thank you.