How Fiberglass Insulation Works
Fiberglass is a composite material made of a plastic matrix reinforced by tiny glass fibers. It is lightweight yet strong, and since glass isn’t a good conductor of heat, it’s a very effective insulation material. Thermal insulation, like fiberglass, stops conductive heat transfer—which is the transfer of heat through solid objects (such as the walls of your home). Most insulation materials prevent heat loss through conduction—reflective materials like radiant barriers work a bit differently.
Fiberglass insulation traps heat when it’s moving to a colder area—from outside to inside your home in the summer and from inside the house to outside in the winter. It is available in loose-fill/blown-in and batt/blanket form and can be installed anywhere in your home, including your:
- Crawl spaces
Fiberglass insulation can not only help you save on your energy bills, but it can also help make your home more comfortable all year long and improve the energy efficiency of your furnace and air conditioner.
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