ROCKWOOL® R-23 stone wool insulation is engineered for high-performance 2x6 wall systems, delivering exceptional thermal efficiency, fire resistance, and sound control in one durable product. Designed to fit standard 16" on-center framing, these dense stone wool batts maintain their shape for a secure friction fit and long-lasting performance. Ideal for residential and light commercial applications, this insulation helps create quieter, safer, and more energy-efficient spaces.