Watch this high-density polyurethane foam raise concrete slabs thanks to the magic of physics. The foam, called PolyLEVEL, is applied through a hole drilled in the concrete, expanding under the ...

The most unusual job that Mike Mitchell, co-owner of Ultra Concrete Lifting, has ever done is lift a two-and-a-half story house that had sunk nearly six inches. "We raised it up to where it belonged ...