Bulk insulation is typically installed in ceilings and walls. Knowing how insulation works can help you decide what part of the house to prioritise and maximise the benefits of insulation in your home. Insulation works by restricting the transfer of heat between the inside and outside of your home. The millions of air pockets in glasswool and polyester insulation restricts the transfer of heat through the insulation segment.
When installed as ceiling insulation or wall insulation, bulk insulation helps to stop the hot air in the roof space or from outside from entering into the living areas below. In cold weather, bulk insulation ensures that the heated air inside the home doesn’t escape unhindered through the walls and up into the ceiling space.
Installing a thicker or higher R-Value bulk insulation will increase the amount of thermal protection, i.e. less heat will escape during the night and in the colder months of the year, and less heat will penetrate from outside in the hotter summer months.