When you purchase a house in Texas the possibilities of the foundation to shift is very large compare to other states due to the clay soils. The main cause of soil movement is the lack of proper drainage. The foundation of a house needs to remain moist enough to keep the house from sinking into the ground. Too much water can create a soil movement that will not favor the structure of the house. The best thing to do is to keep the water draining away from the house, and keep the soils around the house humid. There are other reasons foundation problems can occur, but for the sake of simplicity we will mention the basics first.
Most companies use the concrete pilings for foundation repair. Some companies like to discard the concrete by selling steel piers. We at SOS Foundation Repair can do both. We can also do drilled piers. However, we do not recommend drilled piers since they seem to have a pre-determined dept and tempt to sink down the road. The concrete pilings are much better piers for the money and the warranty is lifetime.