Should I buy an insulated door or non-insulated door?

The answer to this question depends solely on what you plan on using the inside of the garage for. There are many different types of insulation levels that range from 0.0 to 18.0 in R-value. If your garage walls are insulated, you definitely want to have an insulated garage door. This will help hold in the warmer air in the winter and the cooler air in the summer. You would want a higher insulated door if you plan on using your garage as a shop, “man-cave,” or are using a heating/cooling option. A higher insulated door will also help lower your utility bills as you are not losing as much inside air through the garage.