Glass wool has been a popular material used by man for thermal and sound insulation since as far back as 1873.
This is one of the types of mineral wool, which has a fibrous structure and high thermal insulation performance. In the manufacture of glass wool, modern technologies allow the use of up to 80% of secondary raw materials (cullet). Partly due to this factor, the price of glass wool is 2-3 times lower than mineral wool from molten rocks or blast-furnace slag. Accordingly, it is an economically viable material.