ComfortBatt is a stone wool exterior wall insulation that offers thermal protection, fire resistance, and water repellency. Made from natural basalt rock and recycled slag, it provides thermal resistance up to R23 for 2×6 construction, can withstand temperatures up to 2150 degrees F, and will not rot, corrode, absorb water, or promote mold growth. Cost: $30 to $35 per bag. Roxul. 800-265-6878. www.roxul.com.
Roxul ComfortBall Insulation
ComfortBatt stone wool insulation offers R23 thermal value.
