How Insulation Works
Insulation works by attracting heat towards itself.
In summer the heat in the air as well as the heat coming from a hot roof is attracted towards the cooler areas of your home. The heat is trying to reach an equilibrium balancing the overall temperature. As the hot air flows into the cooler areas of your home this has the effect of increasing your home's temperature. Insulation, particularly ceiling insulation, attracts the heat towards itself and reduces the amount of heat that enters your home. This has the effect of cooling your home in the hot summer months.
In winter months the same effect works in reverse. The warmth of your home, created by your homes heating or fireplace, is sucked away towards the cold air outside as it tries to flow out of your home towards the cold environment outside. Once again insulation acts as a barrier between the hot air inside and the cold air outside. Insulation stops the flow of heat out of your home in the winter months. This has the effect of reducing the cost of heating your home during winter, and making life more comfortable for yourself and your family.