Insulation is a means of controlling an environment by providing an efficient barrier to heat and noise. Insulation for preventing heat loss or gain is referred to as thermal insulation. Sound insulation is referred to as acoustic insulation.

Thermal insulation works by minimizing heat flow and preventing extreme changes in temperature.

The key principle is that still air trapped in the space between the glass fibers is a very good insulator. Glass wool can be used in residential, commercial and industrial applications to provide safe and comfortable controlling heat loss or gain.

When installed correctly, thermal insulation plays a vital role in conserving energy and allows capital cost saving on mechanical and electrical equipment. Acoustic insulation works by absorbing sound and vibration. The key principle is to convert sound energy into kinetic energy. Glass wool is a good sound insulator because the flexing action of the fibers absorbs the sound and dissipates it in a form of heat energy of such low intensity as to be virtually undetectable. Glass wool has excellent sound absorption characteristics and with complementary building materials, it enhances the performance of a structure by minimizing the passage of sound. Acoustic irritation is reduced and hearing is protected.