The mantle is a layer between the crust and the outer core. Earth's mantle is a silicate rocky shell with an average thickness of 2,886 kilometres (1,793 mi). The mantle makes up about 84% of Earth's volume. It is predominantly solid but in geological time it behaves as a very viscous fluid.
demolition - an event (or the result of an event) that completely destroys something wipeout, destruction conclusion, ending, finish - event whose occurrence ends something; his death marked the ending of an era; when these final episodes are broadcast it will be the finish of the show
Demolition is a messy business that needs to be done by skilled tradesmen. It involves more than just smashing into in the framing and walls with a sledgehammer. Of course that's part of it. But, it needs to be done in a safe way to prevent injury and that takes knowledge of infrastructure and process. The average cost for residential demolition is $5 to $15 per square foot. For an average room that is 15X15 the cost will fall somewhere between $1,125 and $3,375. This is a rough estimate.