Sep 23 , 2019
What’s the difference between mineral wool insulation and fiberglass?
When most people think insulation, they think fiberglass. It is definitely the most common and is widely used in jobsites across the country. Mineral wool insulation is decidedly less common, despite the fact that this insulation has been around for decades, is widely used in Canada and Europe, and is making a comeback in the United States. It is made by melting down basalt stone and recycled slag from steel mills, which is then spun into fiber that can be formed into batts or boards.
We wanted to know more so we did some research, talked to installers, and filled a few walls with the stuff. Here’s our verdict: Mineral wool insulation has some real advantages over the alternatives.