Mineral wool is very frequently used as an insulation material because of it useful material properties. It is quite cheap and easy to handle.

Is rock wool expensive?

Cost. Rock wool generally costs more than fiberglass insulation. … To insulate a basement measuring 20 feet by 20 feet with 8 foot ceilings, you would need 640 square feet of insulation. At $0.50 per square foot, 640 square feet of insulation costs $320 compared to $397 for rock wool insulation at $0.62 per square foot.

How long will mineral wool last?

Cellulose insulation usually lasts 20 to 30 years before it starts to degrade, and mineral wool also lasts decades as long as it is not damaged. Spray foam insulation is one of the longest-lasting. Many homeowners never have to replace it in their lifetime.