Even if your garage is not heated like the rest of the house, you probably prefer that it stay a somewhat comfortable temperature. Unfortunately for many homeowners, their garage will be freezing cold in the winter and always hot in the summer. This problem is most often associated with problems surrounding the garage door, but there are all kinds of other things that a homeowner will blame. If you have a similar problem, it is wise to start your search for the problem at the garage door. There are a few reasons why your garage door could be making your garage a less comfortable space that is always either too hot or too cold. 

The garage door windows allow in a lot of sunlight. 

Many older garage doors have windows, and even some newer versions as well. However, the older garage door windows were basic single-plane openings that do little to ward off direct UV light, especially if the garage is facing bright sunlight through the day. If this is the case with your garage door, you will probably notice the temperature inside of the space soars in the summer and never seems to cease. In some cases, the windows in your garage door can be replaced with more efficient models, and you may also see some change by tinting the windows to ward off UV rays. 

The garage door itself is poorly insulated. 

Some of the most basic garage doors have little in the way of insulation. For example, some traditional metal doors are merely crafted from thin sheet metal. If you want to see a better letter of temperature control in your garage, it is a much better idea to make an upgrade and get a new garage door. There are models that have insulated panels and are specifically designed to ward off issues with heat transfer and drafts. 

The garage door is installed improperly and allows drafts in your garage. 

Take a good look at the garage door you have installed and make sure you don't see any gaps when the door is shut. Some unwitting homeowners install a door on their own and fail to align the door properly in its frame. This leads to tiny cracks and gaps around the door, which can definitely contribute to poor temperature control in your garage. Thankfully, a good garage door technician can usually rectify the situation through adjustments.