Glass wool consists of quartz sand, dolomite and limestone.

 

Furthermore, adhesive materials and water-repellent oils are added, in order to increase the mechanical strength of the materials, though the use of these elements must be kept within limits to achieve a high fire resistance.

 

Glass wool is produced in rolls or in slabs, with different thermal and mechanical properties.

 

Glass wool is a thermal insulation that consists of intertwined and flexible glass fibers, which causes it to "package" air, resulting in a low density that can be varied through compression and binder content. It can be a loose fill material, blown into attics, or, together with an active binder sprayed on the underside of structures, sheets and panels that can be used to insulate flat surfaces such as cavity wall insulation, ceiling tiles, curtain walls as well as ducting. It is also used to insulate piping and for soundproofing.