A garage door opening is the largest moving object in your home. Insulated doors will help to reduce the transfer of heat or cold air into your garage. This is important for a number of reasons. If your garage is attached to your home, air in the garage can travel through the doorway to your living area. An insulated garage door will reduce the transfer of air from the outside to the inside.
If you use your garage as a workshop, your comfort will be a top priority. An insulated garage door will help keep the temperature in the garage within a narrower temperature range as compared to the extreme range of the outside temperature. If your garage is below another room in your home, air can travel through the ceiling of the garage into the floor of the room above.
An insulated door will keep temperatures in the garage fairly stable to reduce the temperature fluctuation in the room above. An insulated garage door is generally quieter and has a more attractive interior than a non-insulated door.
Steel garage doors offer the broadest range of insulation options and price points. A single-layer garage door is made of one layer of non-insulated steel. Two-layer garage doors feature a layer of insulation combined with an outer steel skin for added comfort, energy efficiency and quiet operation. Three-layer garage doors are the most durable construction with insulation sandwiched between two layers of steel for excellent energy efficiency, strength, durability and quietest operation.
There are two different types of insulation used in garage doors, expanded polystyrene and polyurethane. Both offer good thermal performance and strength.
“R-value” is a familiar benchmark for shoppers to compare the insulating efficiency of a garage door. The higher the R-value, the more energy efficient the door is. “U-factor” is another term related to thermal efficiency that has become familiar to consumers because of the federal stimulus legislation. The lower the U-factor, the more energy efficient the insulation is.