Parts of a Storm Door – 11 Labeled Parts, 2 Views

All 11 parts on the diagram

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Start here: 8 main parts 8

Glass panel The glass insert; on many doors it swaps with a screen.
Screen Mesh that lets air in and keeps insects out.
Handle set The outside lever and its inside handle, working the latch.
Closer Pulls the door shut so it does not slam.
Hinge rail (Z-bar) Screws to the entry door frame and carries the hinges.
Drip cap Tops the frame and sheds rain away from the door.
Sweep Seals the gap between the door and the threshold.
Deadbolt A keyed lock above the handle.

From outside 2

Strike The plate on the latch rail the latch catches in.
Weatherstripping Seals the gaps between the door and its frame.

From inside 1

Hold-open washer Slid against the closer to keep the door open.

How this list was compiled: Read 2026-09-24. (1) A storm door maker's owner's guides and installation manuals, https://media.pella.com/professional/installation/202220631.pdf , https://media.pella.com/professional/installation/31568.pdf , https://media.pella.com/professional/installation/35123.pdf , and its install guide, https://www.pella.com/ideas/doors/storm-doors/how-to-install-storm-doors/ : hinge rail (hinge mounting frame), latch rail, drip cap (top mounting frame), bottom expander and sweep, closers on jamb and door brackets, hold open washer, glass panel, screen, handle, deadbolt, strike, weatherstripping. (2) A second maker's storm door pages, https://www.andersenwindows.com/windows-and-doors/doors/storm-doors-screen-doors/andersen-storm-doors/fullview-interchangeable-storm-doors/10-series-fullview-interchangeable-storm-door , installation page, https://www.andersenwindows.com/support/window-door-installation/installation-storm-doors , door and window glossaries, https://www.andersenwindows.com/support/window-door-glossary/ and https://www.andersenwindows.com/ideas-and-inspiration/blog/tips/parts-of-door , and an astragal kit guide (archive.org, https://archive.org/details/manualzilla-id-6241186 ): Z-bars, drip cap, closer, handle set with keyed deadbolt, hold-open feature, weather stripping, strike, door sweep, glass and screen. (3) Wikipedia, Storm door, https://en.wikipedia.org/wiki/Storm_door : interchangeable glass and screen panels, retractable screens. Licence: own work

The drawing: Drawn for this site by script, 2026-09-24. Licence: own work

How it works

A storm door hangs from a hinge rail, or Z-bar, screwed to the entry door's frame, under a drip cap. Its panel holds a glass panel and a screen, a sweep seals the bottom and closers pull it shut.

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The frame round the door

The hinge rail carries the hinges on one side, the latch rail with the strike faces it, and the drip cap tops both. Weatherstripping fills the gaps, and the sweep closes the gap at the threshold.

Closers and the hold-open washer

Seen from inside, a closer runs from a bracket on the jamb to one on the door, at the top, the bottom or both. Slide the washer on the rod against the closer to hold the door open.

Questions and answers

What are the parts of a storm door called?

The frame is the hinge rail (Z-bar), the latch rail and the drip cap. The door has a glass panel, a screen, a handle set with a deadbolt and a sweep; closers and a hold-open washer are inside.

What is the Z-bar on a storm door?

The hinge rail: the strip screwed to the entry door's frame that the storm door hangs from. One maker calls it the hinge rail or hinge mounting frame, another the Z-bar.

What is the sweep on a storm door?

The flexible strip along the bottom of the door that closes the gap to the threshold. It sits in the bottom expander, which slides down so the sweep just touches.