There are several types of weatherstripping products available for exterior doors. Here are the most common types and how to install them.
Self-stick foam is a very simple and inexpensive option for insulating an exterior door.
Bronze spring weatherstripping compresses against a closed door to create a weatherproof seal.
Installing a vinyl bulb door threshold takes some extra time, but it's well worth the effort.
A crucial part of weatherproofing an outside door is to install a good door sweep. Here are step-by-step installation instructions.