Reduce heat loss with storm doors
Storm doors also extend the life of primary doors.
A storm door is a separate, outer door that protects the primary door from direct exposure to the elements. While it may not be completely weather-tight, a storm door creates an additional barrier and reduces the likelihood of water leaks. As important, storm doors also reduce heat loss and heat gainIncrease in the amount of heat in a space, including heat transferred from outside (in the form of solar radiation) and heat generated within by people, lights, mechanical systems, and other sources. See heat loss. from conductionMovement of heat through a material as kinetic energy is transferred from molecule to molecule; the handle of an iron skillet on the stove gets hot due to heat conduction. R-value is a measure of resistance to conductive heat flow. and air infiltration. When a doorway is covered by a porch or roof overhang, a storm door may be unnecessary for weather protection, but the energy benefits still apply.
Learn more in the Green Building Encyclopedia