Rock wool felt covered with aluminum foil is a type of insulation material commonly used in construction and industrial applications. Rock wool, also known as mineral wool, is made from natural basalt rock and recycled slag. It is processed into fibers and then formed into various products, including felt or blanket-like sheets. The addition of aluminum foil to rock wool insulation serves several purposes: Vapor barrier: The aluminum foil acts as a barrier to moisture, preventing water vapor from passing through the insulation and reaching the building structure. This helps to prevent issues such as mold and rot. Thermal insulation: Rock wool itself is a good thermal insulator, but the addition of aluminum foil enhances its performance by reflecting radiant heat. This can help improve the overall energy efficiency of a building by reducing heat transfer. Fire resistance: Both rock wool and aluminum foil are fire-resistant materials. When combined, they create a more fire-resistant insulation product, making it suitable for use in areas where fire safety is a concern. Durability: The aluminum foil covering provides additional protection to the rock wool insulation, helping to prevent damage during handling, transportation, and installation.
Overall, rock wool felt covered with aluminum foil is a versatile and effective insulation solution used in various building and industrial applications to provide thermal, moisture, and fire protection.