ROCKWOOL (North America) has broken ground on its second U.S. stone wool insulation manufacturing facility in Ranson, WV. The company will invest more than $150 million in the new 460,000-square-foot ...

A proposed manufacturing plant southeast of the Tri-Cities will make building insulation by crushing stone, melting it and spinning the lava-like material in an industrial-strength cotton candy maker.

It takes a lot of power to melt crushed basalt to a lava-like consistency, then spin it like cotton candy to create insulation for buildings. Specifically, it takes enough power to light up a smallish ...