Insulation

• Building insulation refers broadly to any object in a building used as insulation for any purpose
• Thermal insulation in buildings is an important factor to achieving thermal comfort for its occupants
• The insulation strategy of a building needs to be based on a careful consideration of the mode of energy transfer and the direction and intensity in which it moves
• A perfect insulator does not exist, because even insulators contain small numbers of mobile charges (charge carriers) which can carry current
• Insulators are used in electrical equipment to support and separate electrical conductors without allowing current through themselves
• When subjected to a high enough voltage, insulators suffer from the phenomenon of electrical breakdown
• A very flexible coating of an insulator is often applied to electric wire and cable, this is called insulated wire.
• Overhead conductors for high-voltage electric power transmission are bare, and are insulated by the surrounding air