Whether you really need insulation in your garage door depends on your region so the benefits of an insulated garage door and how to select the right degree of insulation to best suit your needs will differ substantially.
The amount of insulation you need in your garage door depends on if your climate is typically cold, hot, or somewhere in-between. With the garage usually being the primary entrance to the home and with living space often above or beside it, it’s best to keep the temperature in the garage as comfortable as possible. This is especially true in very cold or very hot regions. You can choose garage doors with varying degrees of insulation to best suit your needs.
The effectiveness of the insulation is expressed as an R-value. The higher the R-value, the better the insulation in the door.
Another point to consider is that an insulated door is generally quieter and has a more attractive interior than a non-insulated door.
Lastly, pests and insects enjoy nesting in the back of uninsulated garage doors. An insulated door doesn’t give them a place to call their own.