Insulation is used to reduce heat loss by providing a barrier between areas that are significantly different in temperature. Homes without adequate insulation use more energy to generate replacement heat as it is lost outside. The Energy Saving Trust estimates that in an uninsulated home, 66% of heat is lost through uninsulated solid walls and 25% through uninsulated loft/ roof space.
Insulation is very clever. Not only does it make your home warmer in winter, but it also helps keep it cooler in summer. This is a little bit like a flask which keeps drinks hot or cold by providing an insulating layer between the drink and the outside air. Air is a poor conductor of heat, and so the tiny pockets of air trapped in insulation minimise the amount of heat which can pass between the inside and outside of your house. This means that in winter, the heat stays inside your home and in the summer it stays outside!
Different types of insulation materials have different properties, so different products are used for different areas of a building.
A well insulated home prevents unwanted heat loss. This helps to lower energy bills, creates a warmer and more comfortable living space, and helps the environment by reducing the amount of carbon dioxide being released from your home as you burn fossil fuels.