An astragal is the vertical seal strip on the meeting stile of double doors. It closes the gap between leaves for security, sound, and smoke control.
Astragals may be flat, T-shaped, or integrated with panic hardware on fire-rated pairs.
Key Takeaways
- Covers door astragal for commercial property managers
What Is a Door Astragal?
An astragal is the vertical seal strip on the meeting stile of double doors. It closes the gap between leaves for security, sound, and smoke control.
Astragals may be flat, T-shaped, or integrated with panic hardware on fire-rated pairs.
Common Astragal Problems
- Binding or misalignment after frame settlement.
- Worn weatherstripping on exterior pairs.
- Missing or damaged astragal on fire-rated doors — a common inspection failure.
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