Your garage door protects your vehicle and home from intruders and inclement weather. But even with the most level garage floor, a garage door will never sit flush enough to create an air-tight seal. That’s where weatherstripping comes in. Weatherstripping forms a seal between the bottom of your door and the ground, keeping out pests, dirt, rain and flooding. The seal also keeps out freezing wind and snow and hot, humid air, helping to reduce your energy bills. But like any other piece of machinery, it needs to be taken care of to do its job properly.