The perfect way to deal with garage door issues is to go through the content of these tips
The importance of the R value on garage doors
Routinely, our experts in Chicago use the R-Value as a baseline measurement to assess the suitability of certain garage doors for different climate conditions. It simply represents the ability of the structure to resist inclement weather through insulation. The higher the R-Value, the better durability you get and it represents value.
Garage door weather stripping is not insulation
Over time it has become clear that direct insulation is more a hassle than a value, even if you are using Batting material. This is because of the flaking which results from movement. A far better option is to put some weather stripping at the bottom of the structure. In that way you get protection and flexibility.