Poorly fitting doors can be a major source of drafts that keep your house uncomfortable, allowing cold air in in the winter. Weatherproofing can keep your house more comfortable and save you money on your heating bills. Draft barriers help seal your door by covering the gap between the bottom of the door and the 
sides. They're an effective and simple way to start weatherproofing your house.
1. Measure your door's bottom edge. Then head to your local Expert Hardware store to get a draft barrier. The barriers come in standard sizes; you may find one that is the correct size, or you may have to buy a large one and cut it down. Ask in store and we will be happy to help.
2. Position your draft barrier on the door and mark where it should go. Refer to the diagram, and notice how the draft barrier is constructed. Typically, there will be a metal or plastic upper portion with several screw holes, and a rubber edge, or "skirt," extending below. Position the upper edge against the door so the skirt extends down over the gap between the door and the sill. If it's too low it may
interfere with the door's operation, and if it's too high it won't seal the gap effectively. When you have it in a good position, mark the screw hole positions on the door with a pencil.
