With advanced flow of technology construction techniques is improving day by day. And here you will find another burning example of it
The technique is called mudjacking or slabjacking that is used to elevate and level concrete. This new foam technique has been developed by Foundation Works. Polylevel can raise thousands of pounds of concrete in spite of its light weight.
It is a neat idea. It is much easier than digging the fotter, building a support wall, and hiring a concrete truck to support sinking front porch.
It is very useful in terms of search and rescue operations in the rubble following an earthquake.