Stone Wool

Stone wool consists of the same basic materials as glass-wool. Its main differences concern the higher melting temperatures during the production process and the different size of the fibers. These differences make stone wool heavier, with a higher melting point and hence better suited for high temperature applications. The final product is a mass of fine, intertwined fibers with a typical diameter of 6 to 10 micrometers.

 

Stone wool has been tested and shown to be an excellent insulator and a vital component of an energy efficient building. Further, its R-value does not change over time because stone wool is not produced with blowing agents, which off-gas and result in lower thermal performance. Not only is the thermal performance of stone wool insulation maintained over its lifetime, but a building's thermal performance can be maintained because of the dimensionally stability of the material. It will not slump in stud spacing causing gaps, will not expand or contract due to temperature variances in a rain screen or roofing system, all of which contribute to the optimal thermal performance of a building envelope.