Chamber Door's online instruction manual mentions mounting frames, weather stripping, expander sweep systems and automatic door closing assemblies as being unique, replaceable parts for storm doors. Storm doors also contain conventional replaceable door parts, such as handles, hinges, and occasionally glass inserts or screen systems.
The automatic shutting mechanism of storm doors serves to differentiate them from conventional doors, and these mechanisms can become worn or damaged over time. Homeowners can replace these assemblies if they purchase compatible ones from the same company or equipment manufacturer. Another example of a mechanism that must be compatible is the latch-mounting frame, which can either be of the overlap or non-overlap variety.