Depending on where you live in the United States, an insulated garage door is a consideration when buying a new garage door. If you have 3 or 4 season climates, an insulated garage door can significantly insulate your home if your garage is attached to the main house.
The cold in winter is kept away from the home, helping with your electric bill. In addition, noise from outside is reduced and the insulation itself strenthens the garage door by making it harder to dent.
During summer, the same is true for the heat, although if you live in a very hot summer season, the heat can become trapped in the garage even if the evenings cool off. In addition, if a hot engine of a car is parked inside and the garage door is closed, the heat can build up inside as well.
How is the Garage Door insulated?
The garage door is insulated with insulation that is attached on the inside of the garage door to the outer steel of thick gauge metal and then covered on the inside of the garage door with a light gauge steel or plastic backing material. This makes a lightweight be very strong door. Depending on how much insulation you want, the thickness of the insulation can range from two inches of polystyrene or polyurethane to a thin sheet.
Some garage doors come insulated. These usually are the top of the line quality wooden garage doors, although some plastic ones come insulated as well.
When shopping and comparing prices for an insulated garage door, be sure that the insulation type and materials are comparable, or you may be comparing apples to oranges. There are a wide variety of thicknesses and materials that the garage doors are made of that affect price, and you should consider what is really needed for the climate you live in.