Understand the two leaves
The active leaf is the door normally used for everyday passage. The inactive leaf can be held closed by approved hardware and opened when a wider passage is needed. “Inactive” does not necessarily mean permanently fixed.
An astragal covers or controls the meeting edge between the doors in some assemblies. Flush bolts can secure the inactive leaf to the frame and, where specified, the threshold. An astragal and a center mullion are different components, so confirm the actual drawing.
Compare three common arrangements
| Arrangement | Typical purpose | Confirm before ordering |
|---|---|---|
| Exterior pair | Daily entry with a wider opening available when needed. | Weather sealing, threshold, locking, inactive-leaf hardware and tested assembly details. |
| Interior privacy pair | A room that needs a latch or privacy function. | Meeting-edge detail, active-leaf lock and inactive-leaf securing method. |
| Interior roller-latch pair | A nonlocking closure for suitable closets or common rooms. | How each leaf is held shut and whether either can open independently. |
These are configuration categories, not universal hardware packages. A listed fire door, required exit or accessible opening may need a different arrangement. Have the project professional confirm the hardware schedule before purchasing.
Exterior pairs need a complete weather and locking plan
When comparing exterior double doors, ask how the meeting edge, head, jambs and bottom are sealed. The threshold and drainage details matter along with the glass and panel. A decorative cover strip alone does not establish weather performance.
Check the opening sequence. Some pairs require the inactive leaf to close first so the active leaf can latch against the intended surface. Confirm which side will be used most often and where the handle will sit. A full pair width is not the same as the clear passage through one open leaf.
Interior privacy pairs need more than two handles
For a bedroom or office, decide whether the pair needs a simple latch, a privacy control or a keyed lock. Those are different functions. A decorative dummy handle does not latch or lock the leaf by itself.
Compare interior double doors with the selected hardware in mind. If sound separation is part of the brief, ask about the whole assembly and its gaps; the door soundproofing guide explains what to check.
Roller latches suit a different job
A roller latch can hold a door closed without providing a keyed locking function. That may suit a closet or a room divider where security and privacy locking are not required. Confirm the specific catch and handle setup rather than assuming every roller-latch pair operates the same way.
Test the proposed layout on paper: which leaf opens first, whether either leaf can open on its own, and how the opening is held closed. If the use changes later, the original preparation may not accept a different lock without modification.
Put these details on the order
- Interior or exterior use and any project-specific performance requirements.
- Overall frame size, each leaf width and daily-use clear opening.
- Active leaf, handing and intended opening sequence.
- Meeting-edge component and inactive-leaf hardware.
- Latch or lock function, handle preparation and finish.
- Threshold, seals and installation details where applicable.
For a sliding pair instead of a swinging one, compare double barn doors. For the style of a glazed pair, browse French doors. Choose movement and hardware before treating those names as equivalent.
Planning a client project?
Specifying a double-door package for a client? Record the hardware functions alongside the door design. Rustica’s contractor discount program explains professional eligibility and how to apply.
