Why People are Talking About Mineral Wool Insulation
It has been around for decades and though its manufacturing process sounds rough and caustic, it can be downright graceful in its application.
It is mineral wool insulation, "made by melting basalt stone and recycled slag from steel mills and then spinning it into fiber that is formed into batts and boards." It is used in Canada, Europe and China and it show signs of becoming more widely available in the United States. Here's why: