Stand outside the closed door on a dark night and shine a flashlight all around the edges of the door. Keeping the wind out is a breeze. Door sets can be nailed around the sides and top of exterior doors. They not only stop the draft, but they also cushion the door to prevent slamming. Door sets are especially good for older homes since they can compensate for warped jambs or sagging doors.
Sets come in a variety of materials, colors and finishes.
Don't overlook insulation problems that are at floor level. The area under your doors can be a major problem spot. Take a sheet of stiff paper and if you can slide it under your doorway you're inviting cold air, rain, dirt and insects to come right in. To remedy this, install a new door threshold which seals the opening and even improves the door's appearance. Instructions and all the necessary screws are included.