With a thermal conductivity rating of approximately 0.030 W/mK, Rockwool's Fabrock LT Lightweight Black Mat Insulation Panels offer excellent thermal resistance, achieving an R-value of around R-4.0 per inch, which helps minimize energy costs. The striking black mat finish not only enhances visual appeal but also provides a durable surface suitable for various applications. Made from non-combustible stone wool, Fabrock LT ensures enhanced fire safety, meeting rigorous building standards.