Mineral Wool (Rockwool) Insulation: Complete Buying Guide 2026
Mineral wool (stone wool/Rockwool) insulation is made from natural basalt rock. It offers superior fire resistance, sound dampening, and higher R-values than fiberglass while being water-repellent and dimensionally stable. In 2026, mineral wool (rockwool) insulation prices average $1.30 per sq ft, with a typical range of $0.90 to $1.80 depending on your region, supplier relationships, and order quantity.
When budgeting for a project using mineral wool (rockwool) insulation, factor in approximately 8% additional material for waste, plus labor costs averaging $0.70 per sq ft for professional installation. A typical project using this material runs approximately $2,800 including both materials and labor.
With an expected lifespan of 100 years, mineral wool (rockwool) insulation represents a cost of approximately $0.01 per sq ft per year of service life. This exceptional longevity makes it one of the most cost-effective materials when measured over its full lifespan.