Weatherstripping is a crucial element of any door or window, as it helps to seal the gap between the door or window and the frame. This helps to prevent drafts, moisture, and dust from entering the home, while also helping to maintain a consistent temperature inside.
The weatherstripping on the bottom of a door is particularly important, as it helps to prevent cold air from seeping in under the door. Over time, weatherstripping can become worn or damaged, which can reduce its effectiveness. If you notice that your home is drafty, or if you feel cold air coming in under the door, it may be time to replace the weatherstripping.