Most aluminum garage doors are made with special solid-core insulation. Not only does this help to improve your home’s energy efficiency, but it’s also a very durable, dent-resistant design. Single-layer garage doors are not usually insulated and typically consist of just one panel made of metal or wood. A single-panel, non-insulated garage door may cost less, but it won’t provide you with any additional benefits in terms of energy savings and durability. When it comes to energy efficiency, opting for an insulated garage door is a smart long-term investment. Always make sure to choose the option that offers your home and garage the most benefits possible.