It’s no secret to most homeowners that the majority of cold air coming into their homes, and heat escaping, is doing so around the windows and doors. In fact, if you run your hand alongside any of your windows and doors right now, you’ll likely feel at least a little cold air seeping into your home. That’s a bad thing, not only because it forces you to pay a higher heating bill than you need to, but it needlessly wastes whatever kind of fuel you are using to run your heating system. A door and/or window insulation kit can help you solve this problem easily and quickly. When shopping for door and window insulation kits to keep the cold outside where it belongs, consider three different types of products—film, tape/strips, and foam.