Replacement weatherstripping is often available at most building supply and hardware stores. There are a wide variety of materials to choose from including: foam rubber, EPDM rubber, felt, bent metal, and plastic.

When selecting weatherstripping, you should consider the durability of the material as well as what would work best for what you are weather stripping. For example: bent brass and aluminum strips are durable, but they conduct heat easily, don't usually seal that well, and are easily damaged by being bent the wrong way or through poor installation. Bent metal weatherstripping is also one of the most expensive weatherstripping materials. Bent plastics are similar to the bent metals, but are less expensive. They are also less durable. Most rubber and foam materials stay flexible for years, are inexpensive, easily replaced and effectively seal air leaks. You should choose the appropriate door sweeps and thresholds for the bottom of the doors as well.

For the best possible results from your investment, you should make certain that the weatherstripping material will stay flexible under extreme weather conditions. Also be sure to follow the manufacturer's instructions. In general, you should: 1) weather strip the entire door jamb; 2) apply one continuous strip along each side; 3) make sure the stripping meets tightly at the corners; and 4) use a thickness that, when the door closes, the stripping tightly presses between the door and the door jamb without making the door too hard to close.