Types of materials used in insulation
There are many different types of materials use, for example: fiberglass, ceramic, mineral wool, calcium silicate, foamed plastic and glass etc
but the most commonly used nowadays is fiberglass. Thermal insulation, such as fiberglass is used to stop conductive heat transfer which is heat transfers from one solid to another (like walls in your house).
Insulation is formed by three different processes:
conduction is when heat transfers from solid to solid (physical contact)
convection is transfer of thermal energy in which the energy transferred by the movement of particles in convection currents in a fluid.
Radiation is transfer of energy in waves, that does not need a medium to travel through